PEENUR Share definition Flag slang for penis, usually spelled in all caps. Shrivels when SCAREY MONSTURS are about. OMG A SCAREY MONSTUR!! HE'L EET MY PEENUR!! Sorry for using all caps. PEENUR by TripperDay January 18, 2004 0 0 Get merch Get the PEENUR mug. Buy Now — $32.95 See more merch