a NOUN or ADJECTIVE used to describe a marching band member that goes HARD. The term has been used to describe Kappa Kappa Psi members in Funny Greek Shhhh From Around The World 5.0... Normally most of them play the softest of instruments like the FLUTE.
Someone that goes to band camp and pledges hard to play the flute.
Those KKPsi guys are a bunch of Flute Dudes.