Ebonics for "trying." Often used to guage one's interest in participation of some activity.
You trine to go bowling with me?
A girl who is pretty and smart and funny.
(and have big boobies and a nice ass!)
Dude #1: OMG! Did you see the but on that hottie!?
Dude #2: Noooo... I was looking at those beautiful big ones... at the front.
(Dude #2 obviously talking about her eyes!)
Dude #1: Yeeeah... It must be a Trine!