Top definition
An abreviation for great, cool, and awesome.

Mostly used by Goths, in a positive manner.

Goth boy: Hey look at my new hair style.
Goth chick: Gruesome! I love it.
Goth boy: Thank you.
by October_Nocturne January 13, 2008
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2
Yo,MW3 is gruesome dawg.
by dawgger99 January 11, 2012
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