When someone jumps over you and puts their balls in your face. This can happen while you're sitting, standing, or on the floor. It's embarrassing and supposed to be funny. It can happen to anyone, people.
John: Hey! Lucy just fell, and I T-bagged her!
Damien: Oh yeah!
Lucy: You stupid douches!
To have one's dead body spam crouched by another player in any video game, especially online FPS games. Most commonly seen as an act to establish dominance, but mostly people just do it for fun.
Player 1: Camping at their base
Player 2: sneaks up behind him, kills him with a knife, then t-bags him
Player 2: *over the mic* Get t-bagged dawg
When tech support takes so long wearing you out fixing a problem (or explaining how they are fixing a problem bc they live to talk to another human besides their homegrown robot sex doll) to the point you would literally rather have balls on your face instead.
"Ginger, I am really sorry I haven't sent over that TPS report- the Help Desk has been working on my computer for an hour now. I'm really getting I.T-bagged"