To masturbate, to jerk off, to “jerk your gerkin”
Also can be spelled the traditional way of “yolk your goke”.
Friend: “hey wanna play Pokémon cards dude”?
13 year old me: “can’t dude, I recently discovered girls, gotta go....to the bathroom for bout 10 min...
Friend: “ahh gotta go yoke your goke, understandable”.