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She beats her husband with her GMC, which is prolly nuclear-powered and has mad top stops and swagelock fittings
by JJ86 February 01, 2008
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Gun Motor Carriage
A type of military vehicle used mostly in WW2, that's lightly armored
and has a gun, that's useful as a support utility.
A self propelled artillery/AA gun/howitzer

Also used as other abbreviations, for example:
Genetically Modified Cabbage
Keep the GMCs behind the tanks!
The AAGMC in the convoy is there to provide mobile AA fire.
We need to dig in those GMCs before the counter attack or
they won't last long!
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