screaming yips 

noun: a condition, in which a person or animal spontaneously lurches into spasmodic movements consistent with a baby calf which appears to be kicking with its hind legs at a swarm of flies which aren't there; vocalization that is sharp and loud accompanies this action. The duration of this condition is seconds to minutes.

One teacher: "How are your kids today?"
Other teacher answers: "Shit, man, they've got the screaming yips. I'm about to lose my shit!"
First teacher, "Holy Jesus on a Stick, I have them next period!"

screaming yips by Smacfoo November 19, 2004