Top Definition
1) a sheet made of water resistant material that can be lain on the ground to keep you dry

2) a military chick, most often in the army, that sleeps around with guys during field excersises
1) I laid my ground sheet down because the grass it was wet.

2) Shit, Sara is such a ground sheet. She fucked just about every guy during that week long ex.
by til880 May 18, 2010

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