The state, usually long-term, of being a closet homosexual that is beyond the usual level of gay and is too much of a pussy to come out of the closet. This person is usually very angry at the world because he/she has not yet advanced to being able to be a sexual accurate being.
Larry asked his girlfriend for anal sex on such a consistent basis it became clear to her he was a closet clinger.
"Oh for Christ's sake, I wish Jim would just stop closet clinging and stopusing my sister as a ploy to come across as heterosexual" (friend repilies) "Fuck yeah, he's always such a moody bitch every time our family gets together I wish he would just stop closet clinging too!"
Similar in nature to a "glory hole" (holes in restrooms or clubs where people can anonymously stick their dicks in or put their ass against to get fucked.) The only difference being, these holes are located throughout an incestous family's home.