Top Definition
adjective: meaning a more that pleasantly plump woman, sometimes even grotesquely overweight. Not to be confused with Junk in the trunk, there is a difference in junk and nasty fat rolls that have been less than neatly tucked into the pants.

synonym: EW GROSS!
Jim: man, sarah is such a Fat Ass Bitch she should just die.

Ted: quite so but i do enjoy a little "cushion for the pushin."

Jim:.............................don't ever say that again!
by THANKFULLY not a fat ass bitch September 24, 2006

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