A person (generally male) who is so worried about being construed as gay they go out of their way to prove they're not. Thinks every time that they look at a guy they're going to suddenly start having feelings or attraction towards the same sex. 99% of the time the person in question is straight but just a little confused.
When a gay or lesbian is near your area, you can hear them making noise,(a loud heeeey, or other queer making noises)and you yell to your friends "HOMOCLOSE!" to warn them.