Something unexpected, or surprising, can be both positive or negative (similar to "out of pocket"), mainly used in SoCal.
Yesterday my girlfriend threw a surprise birthday party. It was so t-shirt off!
by peppubi December 1, 2015
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very dark skinned black people, because all you see of them in the dark is their t-shirts
ay did you see all those floating t-shirts over there by the bus-stop?
by late! August 27, 2008
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(catchphrase)—coined by the boys to indicate the appropiate time to change into party attire.
"Angelina just got into a fight with Mike before t-shirt time."—Vinny. "Hopefully, they don't get into another fight and she'll punch Mike in the face before t-shirt time."—Pauly D
by NEW JERSEY Diet-SHORE-nary April 13, 2011
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T-shirt blogging

Word: t-shirt blogging
Pronunciation: 'tE-"sh&rt 'bläg*ing
Function: noun
Function: verb

1. To get your opinions out there in the public discourse by wearing them on your shirt. Similar to bumper sticker activism.
Gilbert: Wendy's "The only Bush I trust is my own" shirt is sweet.
Mack: Yeah, she's been T-shirt blogging a lot these days.
by wendyrocks November 6, 2006
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Def1: Expressing you like a band either by wearing merch or listing them as a favorite band but having little to no knowledge of the band

Def2: to call out someone who is a nirvana t shirt by testing them on their knowledge
Person 1: "Oh, nice Nirvana tshirt, whats your favorite song?"
Person 2: "Smells Like Teen Spirit for sure!"
Person 1: "can you.. name any other songs?"
Person 2: "not off the top of my head"
Person 3: "see? I knew she was just a Nirvana T Shirt a$$ mf"
by Pseudonym hymn February 11, 2021
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1.)An insult among gay men, usually bestowed while chatting, indicating that no further conversation. The sender sends the picture to indicate to the recipient that he is being a douche.
Shannon: This guy I'm chatting with is being such a Douche

Tom: Just send him a cat in a t-shirt

Shannon: Cool, now I do not have to talk to him any more!
by Tom-Tom November 17, 2006
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\ ˈtē-ˌshərt ˈbȯis\ n. A member of a volunteer or paid-call fire department who never shows up to training. This member also never responds to calls, even though they may be less than a mile from the call. These members are just in it for the fire department t-shirt.
Well it's Thursday and none of the t-shirt boys have showed up for training.

There was a call one block away from one of the t-shirt boys house and he didn't even respond when Active 911 showed him as being home.
by BC2703 February 18, 2020
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