R.T.F.O. - rock the f??? out. A dynamic level used for parts in music where the writer wants the player to express his or her self excessively during a heavy ride or rock beat section. Often used during writing for non-classical marching band music.

Brain Fart- when you mess up in the Forest Hills drumline

Fun Fun..

Light Bulb- IDK

It isnt funny... but... there is a inside joke with that at my school

Opps you missed one the common saying "git er' dun" (git er dun) meaning to kick a$$ and get the job done.
And then the always favorite "Spell that" used by a drumline when the instructor wants the drumline or drummer to do something they don't wana do, they say " You better spell that" and if the instructor can't you don't have to do the task. ( Well, at least in your mind you don't but it's an ongoing joke)

road kill- n.unexpecting horn that gets hit by the bottom bass

"Vamos a get-down" is ours. Our former percussion teacher (May he rest in peace) used to say that. It basically means to put some emotion into your playing and "get-down" with yo' bad self.

I'm sure we have a lot, but the only one i can think of is "Beach 'em" meaning take your drums off.

A classic that I remember from my high school days was "don't suck." It's about the most inspirational pre-finals pep talk that you can possibly give.