wet-arsed Share definition Flag An insulting term a mature man might use to humiliate a teenager. It implies he is prematurely out of nappies and hence has a wet arse. Don't annoy me, you wet-arsed little prick! wet-arsed by F. J. December 12, 2008 0 0 Get merch Get the wet-arsed mug. Buy Now — $32.95 See more merch