rock-spastic

A condition manifested as a set of spasmodic muscle contractions and gleeful body movements caused mainly by classic rock songs that evoke nostalgia and can cause involuntary shaking, swinging, leg-bouncing, knee-slapping, head-jerking, fist-pumping, and generally rhythmic movements in tune with a favorite classic rock song. Also known as Chair-Dancing.

Wow, the new guy is going all rock-spastic over there at his desk, he must be listening to some classic rock on his headphones.

Dave wrecked that sweet-ass Chevy when he went all rock-spastic over some Pure Prairie League song.