master of your domain
Term meaning one who is celibate for a period of time. More specifically, one who refrains from masturbation. From an episode of the television show "Seinfeld", where the main characters have a contest to see who can refrain the longest.
"I'm dating a totally hot chick!"
"But are you still master of your domain?"
"Nope, they were playing a Baywatch marathon all day yesterday."
"But are you still master of your domain?"
"Nope, they were playing a Baywatch marathon all day yesterday."