Top Definition
A condition common among lead singers of rock bands, characterized by an awful butchering of otherwise simple lyrics. Rocker's Mumble is partially responsible for causing people to stop caring about lyrics. This condition can be caused by use of narcotics or the singer's style quirks.
Ozzy Osbourne does not have rocker's mumble. Though you can't understand him when he's talking, he's clear as crystal when singing.

Kurt Cobain had a case of rocker's mumble, more due to the grunge style than anything else.
by MachineCode April 28, 2007

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