poobarb Share definition Flag Poo on the end of a barb wire stick. To 'poobarb' someone you put said stick into an oraphis of the human variety. The human will undoubtably cry ' POOOOOOOOBARB' poobarb by Laura Yates September 16, 2007 0 0 Get merch Get the poobarb mug. Buy Now — $32.95 See more merch