turd of mouth Share definition Flag Being informed of, by way of oral dictation, shit-talking going on behind your back. Billy: How did you hear that Jamal said you had a seagull dick?Jeff: Turd of mouth. turd of mouth by Arthur Riddic Oldman August 22, 2012 0 0 Get merch Get the turd of mouth mug. Buy Now — $32.95 See more merch