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The action of taking a crap, shit or piss in a place where there are no proper facilities, such as a toilet or tissue paper. It is usually urgent, when there is no time to seek out better accomodations. Sometimes it is uncontrollable, which makes for a better story to your friends at cocktail parties.
1) I made a mistake of eating a box of prunes before I went Mountain Biking. I had to "go caveman" in the woods with leaves and bark.

2) Man did we drink too much last night after work! I had to "go caveman" in the subway.

3) There was no paper in the outhouse; I had to Go Caveman and wipe my ass with my underpants and left them in the garbage can.
by TheFlashSimiValley April 05, 2016
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the act of being so pissed off that you lose your shit and act like a caveman
to go caveman:joey had enough of derek and finally went caveman one night.he slammed his head in a car door,head butted him like 20 times on the ground then bit his cheek
by capt. caveman April 19, 2010
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