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1.
Someone who is an avid music listener. They listen to music ALL the time, and usually are the type of people who know about the latest music. Also they are always trying to put you on a new artist, etc. They also just don't listen to music, they know why the artist wrote the song, what it means, etc. They also are somewhat of a music critic too. It started in Baltimore, vice versa the meaning for sneakerhead. I thought if sneaker lovers had a word & definition, then so should music lovers !
Steve: Did you hear Kendrick Lamar's Section.80?
Diana: No, I don't even know who that is!
Steve: Well you should!!!
Diana: Steve, your such a musichead!
by KiddGabster January 10, 2012
 
2.
Someone who listens to all types or just certain types of music constantly; even for a couple of seconds.
Person 1: "There goes that guy; always plugged into his iPod"

Person 2: "Yea; he's a music head; he likes listening to music"

Person 1: "Oh ok."
by enzo32ferrari December 12, 2008