This is a sarcastic phrase used by gay men meaning "getting ready for a night out at the bars and hopefully getting lucky".
John: I'm ready to head out to boystown now, you coming?
Bobby: I'll meet up with you later, I have to douche my twat!
Bobby: I'll meet up with you later, I have to douche my twat!
by Vermont Fag October 21, 2016
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