Tea bag is a slang term for a sexual act in which the male puts his scrotum into his partner's mouth over and over, like a tea bag being put into a cup of hot water. Some people would not like being tea bagged, but it does not need to be painful. Tea bagging has been used during hazing or bullying incidents. Groups hold down victims while somebody "shoved his testicles in [the victim's] face"  or puts his "crotch to his head. Pretending to tea bag is a popular taunt in multiplayer first person shooter video games, the player who has killed the other crouches over and over on the dead body of their opponent. From Wikipedia, the free encyclopedia.
Why are we talking about teabagging today, just a few days before Christmas? Well, dear friends. Why are people so offended?
If you love Earl Grey tea, this term has nothing to do with that. Teabagging is the act of a man placing his scrotum into the mouth or onto the face or forehead of another person, usually while standing or kneeling over that person. To me, it sounds like a frat-boy joke. When beating an opponent in the game, the victor often makes his onscreen avatar crouch over the fallen foe in an act of virtual teabagging.