LEGO Glossary

LEGO Glossary

I have to admit I do take it for granted that everyone knows the AFOL (ops there I go again – Adult Fan of LEGO) communities acronyms, abbreviations and terms. However, I’m no expert and I’m still amazed at the variety and creativity of our little community and new terms popping up nearly every week! Enough waffle from me, to help clear the fog I listed all I know below:


  • AATB – All About The Brick 🙂
  • ABS – Acrylonitrile butadiene styreneFor the layman that means the plastic LEGO uses for all its bricks
  • AFOL – Adult Fan Of LEGO. If you can legally drink, vote and get married this is you!


  • Baseplate – Various sizes flat plates filled with studs. Start of most builds
  • Bigfig – Supersized minifigures such as The Hulk, Nexo Knight Axl, Wampa etc… are all Bigfigs
  • Billund – The headquarters of The LEGO Group (TLG), Billund is the name of the town where it is located
  • BL – Bricklink. Once the LEGO obsession really starts to kick in and you begin to create your own MOC’s Bricklink becomes your new buddy and drain on finances!
  • Bley  No it’s not some Scottish slang. Shorthand for the colour light and dark bluish grey, known as medium and dark stone by the TLG
  • BOLOCs – Built Of Lots Of Colours. Staple of most kids builds using all LEGO at hand irrespective of colour leading to a rainbow coloured build
  • Brick(s) – The core of LEGO and available in a crazy array of colours, shapes and sizes
  • Brick Built Example instead of using a pre moulded Window, brick built means the window was built from a variety of elements
  • Build – The collective name given to a set or MOC
  • BURP – Big Ugly Rock Piece. A single moulded piece of pre-fab rock-wall


  • Cheese Slope – This little LEGO brick (50746) gets a lot of love and attention. 1×1 tile with a 33 degree slope, going to 2 plates or 2/3 of a brick high. Also called a cheese wedge or cheese block because the shape resembles a wedge of cheese
  • CMF – Collectable Minifigure. Individually sold minifigures that may be stand alone or part of a collectable series. Some of these fetch crazy prices – just look up Mr Gold for an example!
  • Custom – Parts or elements that haven’t been officially produced or endorsed by TLG. They can include paints, stickers, minifigures or accessories from third parties. Very controversial to LEGO Purists


  • Dark Ages – This is the time spent away from LEGO post childhood until rediscovery later in life
  • Design ID – The identification number TLG uses to catalog a specific part. Note – This covers the mold shape not the colour variant
  • Diorama – A large LEGO landscape or scene built on an irregular base. 
  • DSS – Dreaded Sticker Sheet – The bain of the AFOL community the dreaded sticker sheet
  • Duplo – Oversized LEGO especially designed for toddlers to slowly introduce them to the wonderful world of LEGO. DUPLO and LEGO are compatible and DUPLO is often used to help build up the internals of mountain and hillside MOCs by the AFOL community


  • eBrowsing – When your bored and Idly browse the eBay listings for LEGO
  • Element (and Element ID) – The element identification TLG uses to catalog a specific part The official name for each unique LEGO piece. However, the element ID goes one step further and unlike the design ID covers colour variant as well
  • Erling Brick – The Erling brick (headlight brick) is a staple SNOT element due to it’s funky design


  • Greebling/Greebles – A greeble (nurnie) is the fine detailing added to the surface of a larger build that makes it appear more interesting and complex


  • Half Stud Offset – A nifty little building technique that allows the standard stud arrangement to be shifted out of alignment on the plate. This is predominantly achieved using jumper plates


  • Inventory – The common term used to describe a list of parts included in a LEGO set
  • IMHO  In My Humble Opinion and in most cases very humble


  • Jumper Plate – Hard to imagine how the AFOL community would get by without jumper plates. Jumper plates come in two variants either a 1×2 plate with one stud in the middle or a 2×2 plate with 1 stud in the middle


  • LDD – LEGO Digital Designer is basically a CAD program that mimics the process of building LEGO to create virtual models. provide free of charge and can be downloaded onto PC or Mac
  • LXF – LXF file is generated from LDD and can be uploaded to sites such as Bricklink to help order parts for virtual models created in LDD
  • LEGO – Stating the obvious here we all know what LEGO is 🙂 Remember avoid the term LEGOS this is the incorrect plural term that is popular in some parts of the globe
  • Licensed Theme – Theme based on popular licensed material that LEGO has been granted the rights to reproduce in LEGO form (subject to a fee of course). Current examples – Star Wars, Minecraft, Marvel and DC Comics Super Heroes etc…
  • LUG – LEGO User Group. Hundreds around the globe that meet, build and socialise together around their love of LEGO and officially supported by TLG
  • LURP – Little Ugly Rock Piece. Smaller version of BURP and usually tops of mountain or hillsides


  • Macaroni brick – Round Corner 2 x 2 macaroni with stud notch and as name suggests looks like a piece of macaroni
  • Microfigure – Tiny minifigures figures utilised for trophies and stable of the LEGO Architecture theme
  • Micropolis – Collaborative building code developed by TwinLUG based around a 16 x 16 stud module which equals 1/4 of a city block. Four modules create a short block in a city. Each four module block is ringed with a two stud road. Blocks connected together create a 4 stud wide road. Cars are 2 studs, buses or trucks 4 studs. Scale: 1 brick is 9 feet, 1 plate is 3 feet and one stud is 7.5 feet
  • Microscale – Generally builds that are a smaller scale than minifigures
  • Minidoll – A variant of the minifigure that has been tailored especially for female centric themes such as LEGO Friends, Elves, Disney etc… sets
  • Minifigure / Minifigs – Minifigures are the standard or blueprint for most set scales and populate the LEGO world. literally thousands of variants and designs and very collectable
  • MISB – Mint In Sealed Box. Of course normally means premium prices if buying retired sets
  • MOC – My Own Creation designed without instructions normally with the assistance of software such as LDD, but not always if you’re fortunate to have lots of LEGO
  • Mocular – Fan built MOC but in keeping with the rules laid out by LEGO in its Modular series.
  • Modulars – A series of sets designed predominantly around a 32×32 baseplate aimed at AFOLs. Multistory buildings fully enclosed and designed to minifigure scale. Each floor clevely lifts off to reveal internal detailed fit out. The modular series was launched in 2007 with each modular thereafter connecting together forming a street scene. Some of the older sets fetch quite a price over on eBay and Bricklink
  • MURP – Mini Ugly Rock Piece.


  • PAB – S@H Pick A Brick site for buying individual elements
  • PAB Wall – The holy grail for the AFOL Community (even more so for us poor souls with non near by). A glorious wall of random elements located at physical LEGO Shops. Basically grab a cup and fill it up with the elements you want
  • Plate – Unlike the thinner one sided baseplates a plate is a third of the height of a brick and allows for bricks to be connected both underside and topside
  • Polybag – Usually promotional plastic bags used to promote certain themes with often unique minifigures or small sets
  • POOP – Parts Out of Other Parts. Term used for large single moulded pieces that often looked at as being rather ugly and considered prime for being constructed in smaller existing parts
  • Purist – I include myself in this term and only deal with LEGO and nothing else


  • Rainbow Warrior – Same as BOLOCs and builds using every colour available to hand
  • RLUG – Registered LEGO Users Group; a term used by TLG to denote a local LUG that is officially recognized by LEGO via the LEGO Ambassador Network.
  • RLFM – Registered LUG Fan Media. A brand new term used by TLG to denote an officially recognized online LUG that covers LEGO reviews, news etc… now used for prominent bloggers.


  • S@H TLG’s online LEGO store
  • Set – General term A product released by TLG containing parts, instructions, and most of the time, minifigures
  • Sig-fig – AFOL minifigure version of themselves, both physically  and virtual (avatar) in online communities
  • SNOT – Studs Not On Top. A technique that is used to hid studs by either connecting LEGO elements on their sides or upside down
  • STAMP – Stickers Across Multiple Pieces. Not that common now!
  • Stud – The iconic stud which forms part of the LEGO patented LEGO connection system. The round studs are also used as a measuring system i.e. 32×32 stud base plate used for LEGO modular theme


  • Technic – Another LEGO variant like DUPLO introduced in 1977. Technic is compatible with LEGO and has bled across into traditional LEGO sets extensively. Technic adds additional parts such as axles, gears and rods which enables more technical/mechanical models to be built
  • Theme – Name given to a particular range of LEGO sets that have a common theme such as Nexo Knights, Star Wars, City etc…
  • Tile – A LEGO piece the same thickness as a plate, but smooth with no studs
  • TLG – The LEGO Group – Parent Company of all things LEGO


  • UCS – Ultimate Collectors Series. Normally supersized and rich in detail and aimed specially at the AFOL community.
  • USP – Unique Selling Point