Adult Fan of LEGO. The most common term used to refer to LEGO fans who are adults.
Billund, Denmark. Headquarters and primary design center for The LEGO Group.
A universal name for a LEGO piece, regardless of shape or color.
A LEGO fan whose primary interest is building MOCs.
Construction toys “compatible” with LEGO created and sold at lower cost, designed to compete with LEGO brand building bricks. Often used to specifically denote brands which infringe upon copyright/trademark (to distinguish from legal competitors). Considered off-limits by most LEGO fans.
A LEGO fan whose primary interest is collecting official sets.
A period in a LEGO fan’s life when he or she sets aside LEGO in favor of school, dating, motor vehicles, or other non-LEGO pursuits.
A universal name for a LEGO piece.
The list of LEGO elements that are included in an official LEGO set.
LEGO Digital Designer. The LEGO Company’s official program for designing digital LEGO models.
A highly sophisticated interlocking brick system. Also a children’s toy played with by many adults.
Oh no you didn’t! Technically, the official plural form for more than one element of LEGO is “LEGO® brand building bricks”. That’s ridiculous, though, so most LEGO fans refer to one or more bricks as “LEGO”, following the grammatical convention of “fish” and “sheep.”
Short for Minifigure. The blocky miniature figures featured in most LEGO sets.
The thin, curved figures featured in LEGO Disney Princess, Elves, and Friends themes.
My Own Creation. Any LEGO creation designed and built by a LEGO fan without instructions. Generally pronounced “mock” (not “Em-Oh-Cee”)
Any LEGO piece which is 1/3 the height of a brick.
Short for Signature Minifig. The minifigure version of a LEGO fan that he or she uses in online communities as an avatar. Sigfigs may or may not resemble the person physically, as LEGO fans used to interacting with each other online often discover at LEGO conventions.
Studs Not On Top. A building technique that places LEGO elements on their sides or even upside down to achieve the shape or structure the builder wants in their creation.
Sticker Across Multiple Pieces. A dreaded situation where a set’s instructions require a sticker to be placed across several pieces, ensuring the pieces can never be separated without ruining the sticker.
The distinct cylindrical bump or knob on the surface of LEGO bricks and serves as one half of the mechanism by which pieces interlock.
Any LEGO plate which is devoid of all or most studs, giving it a smooth upper surface.
Adapted from The Brothers Brick, see more at http://www.brothers-brick.com/lego-glossary/