A person who only sticks to listening to one type of music and is reluctant to anything new therefore their taste is stale.....like a crouton.
Dude #1 "Hey Man have you heard the new Drake?!"
Dude #2 "Drake's a FAAAAG!!! Sabbath rules!!"
Dude"1 "You're such a Music Crouton!"
by will bitten January 9, 2018
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