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An ugly girl who would be considered a zero on a scale of 1 to 10. Who also happens to have the chest of a 10 year old boy and the ass of Plank (Plank from ED, EDD, and EDDY).
Josh: YO, that girl is a flatzero.

Tom: Its not Ashley's fault she hit every branch when she fell out of the ugly tree.

Josh: She still a flatzero BRO!
via giphy
by uglyasianwhore March 01, 2018
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