MOC is an acronym that stands for “My Own Creation” and is commonly used among the Lego community to differentiate an individual or group project with an official Lego set. The Lego community often abbreviates to shorten the length of commonly used terms and phrases. Acronyms are not an uncommon thing for people to use to shorten the length of speech, but the acronyms that are used by Lego fans can often get confusing, especially for those hearing them for the first time.
What is a Lego MOC? What is a sigfig? What is SNOT bricking? The Lego community has definitely been creative when it comes to their abbreviations, sometimes to the point where other people can’t understand what they’re saying. So I have compiled a list of some of the most commonly used Lego terms, so that if you’re ever stuck wondering what I, or any other Lego hobbyist is saying you can come back and “translate” it from Lego into English!
My Own Creation – A Lego build that is done by an individual or group and not an official Lego set
Adult Fan Of Lego – Pretty self explanatory, but this an adult who still enjoys building and collecting Lego. Other related definitions are TFOL – Teen Fan Of Lego, and also KFOL – Kid Fan Of Lego.
Big Ugly Rock Piece – This is an actual term recognized in the Lego community to identify a certain grey Lego rock piece.
Brand New In Box – A term used to describe the condition of a Lego set, usually when purchasing it second hand after it’s taken off the shelf.
Lego User Group – A group of Lego hobbyists, either local or international, who share in the same interests that work and interact with each other on the topic of Lego. It is common to be part of more than one LUG.
Studs Not On Top – Used to describe a building style in which the round studs on the top of the bricks are not facing upwards in the traditional fashion.
Studs Not In a Row – A term closely related to SNOT bricking as bricks are placed together in nontraditional methods, such as two interlocking plates at 90 degrees. This is different from SNOT bricking as the studs are not necessarily sideways, rather interlocking in “illegal” methods.
Lego Digital Designer – Lego’s digital designing program that was released to be able to design and edit builds using the computer.
Not an acronym, instead a term used to describe a copy-cat version of Lego. These brands (without naming names) are usually cheap in quality and price and are incomparable to the true Lego product. Always be careful of clones and fake Lego as there is increasingly more of it in circulation.
The more commonly used term for a Lego person.
Collectible Mini-Figure – A term to describe Lego’s series of collectible mini-figures.
Signature – Mini-Figure – Used to describe a mini-figure that resembles or represents yourself or your Lego social media accounts.
Bricklink’s version of LDD. Bricklink is the number one online marketplace for used Lego and products.
A term used to describe “criminal” building methods in which pieces like plates are shoved in the back of bricks to hold two bricks together back to back. There are many ways of illegal building, and is commonly used in micro-MOCs to create features that are otherwise impossible at such a small scale.
Ultimate Collectors Series – A series of Lego sets that are designed as display models rather than playing sets. Most commonly used for the Star Wars theme, UCS has been extremely popular for many years with the most recent UCS set (the millennium Falcon) being the largest set ever released by Lego.
I hope that these definitions helped and maybe clarified some of the strange language you might have heard watching Lego videos or reading Lego news. There are many other terms too, but these are the main ones that you will most commonly hear. If I did miss anything important or noteworthy, leave a comment and let me know!