Sassdominic Share definition Flag a name given to someone who likes to whine constantly about anything and everything. "Will Ariadne ever stop whining about the size of Alyson's breasts? She's such a Sassdominic!" Sassdominic by Beej July 19, 2003 0 0 Get merch Get the Sassdominic mug. Buy Now — $32.95 See more merch