gay stain
The member of a group of friends always performing gay acts or pretending to act gay, therefore marring that groups reputation.
Beau: Nah, we can't bring Carl over to Chris's house. That gay stain will do something embarassing while we are there.
Shawn: Yeah, you can't really argue that. Chris is the epitome of gayness.
Shawn: Yeah, you can't really argue that. Chris is the epitome of gayness.