Top definition
(adj) Describes a woman's ass that is flatter than a one-sided pancake. Washboard asses are usually found on woman with a huge rack.
Dude 1-Holy crap! You see that girl down at the end of the bar? Her tits are spilling out of her shirt!

Dude 2- Yeah, I've seen 'em and they're nice but do you see her washboard ass?
by mhibma April 24, 2006
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