A word invented by =WTF= members of the America's Army multiplayer FPS online game. It is the act of inserting your scrotum into an enemy's mouth after being shot, blown up, thermited, etc... Especially funny when they land in precarious positions, when they are acting likebitches, a noob, or even more funny when they are part of the same clan. Even more funny when you let the receiver of this ungodly act know that you forgot to wipe, forgot to shave or purposely shaved your nuts, or any other variation of scrotum modification.
"LOL, hey Baz I just T bagged that fucking noob Dr. Spray and he enjoyed it, what a homo!"
Shallow abbreviation of first name "Tom" or "Thomas". Comic shortening of an alreadyshort first name. "T" as in "Mr. T". This, among other now imperceptible ponderings, through transmogrification, equals the capitol "T" mixed with the logical addition of "Bag"; especially when under the influence of tequila, hence, T Bag.
"Don't comerunning to me for answers as to why we destroyed Mrs. Wilson's tulip garden with the delivery truck....Blame it on Mr. T Bag".