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1.
a game that a group of tards play. they stand outside the artroom and slap eachother in the scrote. kids with dick on the brain, nuts in the mouth and two-wheel dumptruck in the ass all the time.
those kids are so gay. they play tagbag all the time. they will never have kids and never get any poon. those poor fucker.. small johnnies...bitches..
i hate those tagbag fuckers...
by KidA May 04, 2005
 
2.
When two gay men top a third gay male bottom.

Entomology: a combination of 'tag team,' 'to bag,' and possibly 'teabaggery.'
They met a guy in the club and tagbagged him behind a dumpster.
by kmwc March 14, 2011