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The act of being scolded by a U.S. Marines Staff NCO, usually the rank of Gunnery Sgt. for doing something/inappropriate.

This often times leads to the Junior Marine shitting his pants.
We were Marching to class when out of nowhere, a GySgt stopped us and yelled at us for marching to fast.

PFC Johnny was totally Gunny-Raped that day.
by XKalibur July 21, 2011
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