When a person (man or woman) blatantly states that another person (of the same sex, usually a close friend) likes the person that they like. The person that is accused of liking is the blowover. Blowover is used as a noun "for" something. The "for" will be directed to the person who the original person likes.
Man, Jim is totally using Gary as a blowover for Mary.
by squishguinco June 13, 2011