1. To mount, fuck real fuckin hard, pin down and fuck (dominate - S&M), to be the recipient of any of this.
2. To burn, override, shut down or in any way make a fool of someone else. To out-achieve and out-do someone in effort.
3. The icing on the cake, the last straw, the end-all; where something occurs that hits your breaking point and you go fucking bucknutty.
Jeffy: Yeah man, she looked like she was walkin funny this morning. But you shoulda seen the cow I got with last night. She was a fuckin PSYCHOBITCH!! *I* got topped off in a bad way that time.
Jamal: Harsh, dude, you are a pussy!
2. Billy: Hey Bosun, I don't like you looking at my girl, Janie, in that regard. Quit it.
Bosun: Fuck, nigga, I look at her that way cuz I was remembering the countless times I blew my cocksnot in her meathanky! *She* was tellin me how much I topped you, and this burn right *here* fuckin tops you, bitch!
Billy: You are just being not serious and an ass.
Janie: No, it's true.
3. My car broke down, I was fired, I got colorectal cancer, my stocks crashed and now I'm bankrupt, my girlfriend choked on some Jamal's cock and died, and to top it all offI HAVE ERECTILE DISFUNCTION SO I CAN'T EVEN SCREW MYSELF TO SLEEP!!
"Damn right that's some good T.O.P."