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1.
The alias of Niel Cicierega, the founding father of animutation.
Trapezoid just released a new video!
by Taylor Esformes March 29, 2004
 
2.
n. A quadrilateral pair of breasts of either sex or animal having two parallel sides.

sl. Trappys, Trappers (Chief Brit).

New Latin trapezods, from Greek trapezoeids, trapezium-shaped :trapeza, table; see trapezium + -oeids, -oid. Old English trappytits.
"That's a strange table-looking bra that woman has on Dan," "No that ain't no bra Grant, those are trapezoids!"
by ZimmFilmz August 28, 2005
 
3.
Much like a rhombus referring to a particularly attractive asian woman (who has a slanted box), a trapezoid (or 'zoid) refers to a woman who's box has no correct angles. Basically, an ugly woman.
Jesus, did you see that hot rhombus that just sauntered out of the locker room? Her fat friend looked like an even bigger trapezoid by comparison.
by RabbiRabinowitz March 23, 2006