A person who can adapt and fit in to any group or situation and make it work to their advantage. Be it defensive, predatory, or for camaraderie.
Alpha's hate these dude, as they basically do whatever they want and completely get away with it.
Kaiser Soze was a chameleon.
Someone who is obviously gay, no matter how many times he/she marries someone of the opposite sex.
Married or not, that guy's a goymersexual