Definitions by BerkeleyImprov.com

mimp 

Musical IMProviser

A musician, usually keyboardist, who improvises music to support improv theater performances.

The mimp played a wide variety of tunes for that "Sing about it!" scene.

mimp by BerkeleyImprov.com December 9, 2012

mimping 

Musical IMProvisING

The act of musical improvising, usually on keyboard, to support improv theater performances.

The mimping for the opera scene was outstanding.

mimping by BerkeleyImprov.com December 9, 2012