A mixture between the words "Boner" and "Terrific." Mainly when you see a girl, or a picture, that it's so damn boner worthy and almost instantly gets you hard. Especially if it's your crush or your girl.
Loyal Friend 1: Damn, dude. Look at this. *Shows photo of girlfriend in bikini*
Loyal Friend 2: Shit, man. That is straight up bonerific!