Gnar Dick Share definition Flag An STD from getting head from a girl with a gnartooth. It makes your dick crocked and bent. Person one: "Dude, i just got head from a TMMG with a gnartooth, and now my dicks all bent!"Person two: "Bro, you have Gnar Dick!" Gnar Dick by Washoe October 10, 2013 0 0 Get merch Get the Gnar Dick mug. Buy Now — $32.95 See more merch