arse wees Share definition Flag Excessively runny poo. Like peeing from the arse. OMG, I have the worst case of arse wees, my arse is sooo sore! Must have been the chicken! arse wees by Leif Warren August 4, 2007 0 0 Get merch Get the arse wees mug. Buy Now — $32.95 See more merch