1. A sexual act wherein a man inserts his scrotum into another person's mouth, imitative of the act of brewing tea. It may be done for erotic or mischievous reasons.
2. The act of protesting certain fiscal policies of the federal government, performed by conservative American citizens who do not understand just how out of touch they are with the nation's youth.
Be it a frat party or the National Mall, remember: teabagging impresses no one and will only lead to a bad taste in someone's mouth.