Short for Twat Props. A hand signal used, most often by a woman, to signify a show of respect to another cool chick, or a 'sister woman'. (see other definition) The signal is made by making the 'peace' sign with the index and middle fingers, and tapping the crotch area lightly a couple of times whilst gesturing toward the other woman.
"Yo Babs, That chick is one hell of a sister woman. Let's give her the T Props!"