Phishead is to Phish what Deadhead is to the Grateful Dead.
1.) Somebody who is a great fan of the band Phish
2.) Someone who, every chance they get, goes to a concert, or listens to music of phish.
1.) My God my little brother is a total Phishead.
2.)EX of Phishead speaking:: Tonight I'm going to my 89th show!!!