Slaying your Dragon
A synonym for jacking it or male masterbation
The tall nerdy kid in flannel got back from class and asked his roommate "Were you slaying your dragon?", in an accusatory tone. Then his roommate, a fugacious flannel wearer himself answered "No but I'll slay your dragon, we do share a bedroom". "Ok high five" said the tall nerdy kid.
to slay your dragon
to voluntarily enter rehab for a drug/alcohol abuse problem.
i know it's hard, but most people need to know how to slay your dragon, or their dragon, rather, without waiting for the problem to get worse.