Clothing and/or make-up that a hooker/streetwalker/prostitute might wear.
1) "I wanna' to get laid tonight so I'm gonna wear my prostisuit out to the club."
2) My girlfriend puts on her prostisuit so I can smack her around a little and fuck her like a dirty whore.
any manner of garment or clothing worn by prostitutes
You know she got paid yesterday because she's wearing a new prostisuit tonight.
"John" ripped Apple's new prostisuit.