a new breed of a rat and a chipmunk. it eats food just like a chipmunk with a small trace of ratness. if you harm a ratmunk, it may--i mean 'will' harm you! and attack you with absolute no mercy sometimes being fatal.
ex.1: EVA, ex.2: EVA, ex.3: the one and only EVA
by WHO CARES March 20, 2005
1 more definition
a nasty looking person, a person who resembles both a chipmunk and a rat
DANIELLE B looks like a ratmunk.
by theeakenator November 14, 2007