A dance move in which ones arms are held stright above ones head and fingers are fluttered as if they were tenticles of the jellyfish . In addition the body spins in a semi-circle pattern back and forth. This is often done to mock a lame show or pit. Be prepared for confrintation after the jellyfish.
Kathrine: That show yesterday was so lame.
Mike: Yeah, but did you see when Bob and Scott started Jellyfish moshing, that was too funny.
Kathrine: Yeah i did, too bad they got beat up afterwards.