A cut you receive from a handjob where the servicer has one long middle fingernail. Side effects may include the desire to stay up all night and watch anime.
A: "Sup buddy, want a handjob?"
B: "No thanks, the last time you gave me one you gave me a chostincut."
A: "Ok then. Wanna go to cha?"
B: "No thanks, I'm too busy watching anime."