AFOL? LUG? MOC? The LEGO world has a lot of specific acronyms and terms that can be confusing. You may see these in the mailing list, Facebook posts, or on LEGO-related blogs.
AFOL: Adult Fan of LEGO
If you’re over 18 and a fan of LEGO, you might be an AFOL. Similarly, you could be a KFOL (Kid Fan of LEGO), TFOL (Teen Fan of Lego), or WAFOL (Woman Adult Fan of Lego).
LUG: Lego User Group
PortLUG is one of many LEGO User Groups around the world. They can be registered (official) or unregistered (unofficial). PortLUG happens to be a registered LUG (sometimes seen as “rLUG”), which means we meet LEGO ‘s requirements. For more information on the LEGO community, visit the LEGO Ambassador Network site.
MOC: My Own Creation
This is the term we use to reference original LEGO creations. You may also see “SEC” (Someone Else’s Creation, when sharing original work that another person created), or “MOD” (modification, for example if you make adjustments to an official LEGO set).
TLG: The LEGO® Group
This acronym is used when referencing LEGO as a company. You may also see “TLC” (The LEGO Company”), though The LEGO® Group is the official name of the entity.
This is a very short list of the most common terms, but there are many more out there!