Top Definition
something so awesome it makes you want to shit your pants.
Katie, thanks for the new toilet seat for Christmas, it's absolutely dumptastic!!!
by Jamie Sigman February 03, 2008
A girl with an amazing dumper. Dumper is an affectionate term for a girl's ass.
That girl's butt is DUMPTASTIC!!
by Mr Brainwash February 16, 2011

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