Term used by the cast of "MTV's Jersey Shore" or MVP: Mike Vinny Pauly. T-Shirt Time is when you're sitting in the living room in your white beater or any colored tank top before actually putting on your shirt. In other words... "It's the shirt before the shirt."

It's the sweat that accumilates under big boobs

(catchphrase)—coined by the boys to indicate the appropiate time to change into party attire.

The concept made popular by Mike "The Situation", from the popular reality show, "The Jersey Shore".

The concept, as defined by The Situation: "We have an abundance of wife beaters ... we wear before we go out. Then it's T-shirt time. Right before we go out we take off the tank and then we put on our fresh shirt."

when its time to take off the wife beater(aka the shirt before the shirt) and put on a fresh t-shirt for going out and creepin

After you pre-game/drink with your tanktop or whatever, you go get a dope t-shirt to wear before you head to the clubs and party. made famous by M.V.P. of jersey shore.

Screaming "T-Shirt Time!!!!" implements the start of getting ready to party.