When you're high, you go through packs of cigarettes like they're nothing. Triangling is what happens when you inhale too quickly and it only burns the outer section of the cigarette, creating a triangle like cone shape out of the burning tobacco.
"Nigga, stop triangling." "fuck, I need to smoke slower. I'm hella triangling." "You triangling, fiend mother fucker."
The act of playing or performing with a triangle in a breathtaking musical score
Guy: Did you see that orchestra last night?
Dude: Hellz yeah, that triangler was triangling the place up!!