the phrase you say when you're staying over someone's house for an extended period of time and you havn't masturbated in a while. So you go to the bathroom, lock the door. and masturbate.
Some users may say they're going to "Take A Shower" and get in the shower solely to pleasure themselves.
i was over my cousins house for a month, and every couple of days i'd be "using the bathroom" or go "take a shower" and relieve myself.