Any form of music, usually used to describe any usually overrated band/artist/genre described as "scene" or ending with the suffix "core," used as a negative connotation to indicate their mediocrity in musical complexity, originality, intelligence, talent, etc.
My Chemical Romance, Senses Fail, Circle Takes The Square, Silverstein, Atreyu, The Used, Hawthorne Heights, 90% of local New Jersey bands, and any bands that call themselves "hardcore" to avoid the connotation of the word "emo."
by b1lskirnir May 5, 2005
 Get the mediocoremug.
Get the mediocoremug. by Jon Kruse May 3, 2008
 Get the mediocoremug.
Get the mediocoremug. a genre of music that is just okay, as opposed to hardcore, metalcore, popcore etc. a play off the word mediocre.
by quince tm August 24, 2008
 Get the mediocoremug.
Get the mediocoremug.