SumDumFucc Share definition Flag A cool ass dude that everyone knows and adores. Also, takes the Blame for most things other people Deny. Sumdumfucc stole my girlfriend with his beauty and charm! SumDumFucc by Sumdumfucc January 28, 2009 0 0 Get merch Get the SumDumFucc mug. Buy Now — $32.95 See more merch