uckus Share definition Flag A fat thot that thinks their the shit, but their really just wearing very tight pants that go up to their butt cheeks. She that girl in the park, that girl is a uckus. uckus by Thetinggoesuckusreereeisriley October 31, 2017 0 0 Get merch Get the uckus mug. Buy Now — $32.95 See more merch