Top Definition
Used as a noun to describe a physical object bearing no redeeming qualities whatsoever. Can also apply to one's behavior.

see: shit, asshattery

also: assmason
Object: "We could have wound up with something great, but the result, instead, was this horrifying lump of assmasonry known as Enter the Matrix."

Behavior: "Tim Roberts' continuing assmasonry regarding the Phantom is already the stuff of legend."
by GARY LOVES THE BACON May 12, 2004
3 Words related to assmasonry

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