when your with a group of people and one person starts to stand up straight like they see something
you see some one you think you know but no one else sees them so one of the other people sees you rise up and says y you t-in up son
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To do something in a white trash manner, the "T" refers to the trashy way of doing something.
When your buddy is thinking deciding between using a t-shirt or a wife beater, you tell him to "T It Up" and choose the wife beater.
by johnnyenglish322 May 3, 2007
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*basketball team gets a dub*

Fan/player: “AYEEE T ME UPPPP”
by Deeaassegvfed February 25, 2020
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A term to convey a person getting into trouble. T being short for technical foul in basketball. A person getting a T is being punished.
Josh: "Did you see Connor break that window?"
Logan: "He better be careful or the principal is gonna T 'em up."
by AJ666 August 3, 2021
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YRG slang for ‘tighten up

Demanding someone to act right and stop acting “off”
Guy 1: Bro, I think I got caught feelings for Jessica.
Guy 2: T up, you already know Jessica is for the streets.
by Hubolts December 5, 2020
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To step up. Say it when you want to or are about to fight
Boy: t up pussy
Boy #2: wassup nigga!
by Lovequeensosa December 1, 2015
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