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1.
n. an ass so nice it makes you want to cry; see also onion booty
Did you see the onion ass on that hottie? Damn!!!
by joe rockhead February 01, 2005
 
2.
An ass SO amazing it brings a tear to you eye
Dude did you see that girl that works at Long Bottoms Coffee Co.? she has SUCH an onion ass that i cried the whole time i was in there!
by PersianDeity March 06, 2008