Rougeau Share definition Flag n., refers to the blood flecks in a beard while performing cunnilingus on a female during her period. "Wow! that's some rougeau you have there. I warned you I was on my period." Rougeau by CaptSnapper August 4, 2016 0 0 Get merch Get the Rougeau mug. Buy Now — $32.95 See more merch