Top Definition
Tit Up - the female equivalent of Man Up.
Tit Up girl! We've got places to be and men to see.
by kallellyb April 17, 2011
2 more definitions
When mamary glands on a woman's chest move up a cup size.
When I first dated Samantha she had D cups, now she is down to a B cup.

Man, that girl better titup!
by Juanchoyuc October 20, 2010
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 03, 2007

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