gay party-pooper

A Gay Party-Pooper is a person who ruins anybody's good time by suggesting something a group of people are doing, or are planning to do, is gay.

Guy 1: "Hey you know what would be fun to play? Twister!"
Guy 2: "I love playing twister, let's do it!"
Gay Party-Pooper: "Playing twister with other guys is gay."
Guy 1:"Why are you always such a Gay Party-Pooper?"