Accidental Floss Share definition Flag When someone performs oral sex on another person and gets a pubic hair stuck in his or her teeth. Georgia didn't trim down south before our last hookup. As a result, I got some accidental floss 'tween my teeth. Accidental Floss by Squeentips November 12, 2010 0 0 Get merch Get the Accidental Floss mug. Buy Now — $32.95 See more merch