When you take your man pouch and move it across an enemy's pillow when he's away. When he falls asleep his face will have been on where your business has lied. The number can be replaced with how ever many hours the victim sleeps.
Man: "I was so angry with Steve last night that while he went downstairs, I gave him the ten-hour t-bag."
When you kill someone in Call of Duty in an exceptional manner and the coast is clear, so you repeatedly crouch and stand above their body to simulate a t-bag in celebration.
Yes! Headshot! *Checks surroundings* Aight, COD T-Bag time!!!! *Walks to dead body* *Crouch stand crouch stand crouch stand* That was awesome!
The 'post frag t-bag' is a variation on the physically expressed gaming insult known as t-bagging. The phrase refers to performing the t-bag action on a recently killed enemy or group of enemies that was specifically defeated by the use of fragmentation grenade. Due to the large splash damage of fragmentation grenades, it is not uncommon for multiple targets to be killed, and therefor multiple players being 'post frag t-bagged'
player 1 - im on a killstreak, watch my back
player 2 - No can do, i just pwnd some noobs and im going in for the post frag t-bag