The act of pretending to be homosexual with a friend in agreement. Usually used to avoid encounters at social gathering places such as bars and clubs with flirtatious and unattractive members of the opposite sex.
The act of Gay Guise implies further advances to your friend in agreement, e.g., holding hands.
Disclaimer: The Gay Guise is only a temporary solution to any unattractive or annoying member of the opposite sex. Excessive use of the Gay Guise or inappropriate use can cause your friends to exile you for "Switching to the other team", or attracting actual homosexuals.
Douche2: "Yah bro, High Five! Awesome. So what'cha babes doin' tonight?"
Girl1 uses Gay Guise.
Girl1: "Probably scissoring each other. Probably kinky."
Douche1: "Whoa. Uh. Hey. Hey! I love this song, mann, catch your girls later. Lets go brosef."