Arsebeard Share definition Flag Quite simply the beard that tends to form between one's buttocks, more so for the chaps than the ladies - though not unheard of for the latter. My god, I was with this chick last night and she had a bloody great arsebeard !! Arsebeard by adiep January 3, 2011 0 0 Get merch Get the Arsebeard mug. Buy Now — $32.95 See more merch