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
1 more definition
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