Top Definition
One guy one cup is a man who squats-naked-on a large pickle jar. After milling around a bit, the jar shatters while inside his rectum and he keeps his camera face, not saying a word. While hearing the shards of glass in his rectum grinding about, he starts pulling them out, bleeding massive amounts of blood.
Bro, I just saw one guy one cup and I can't imagine anything more f'd up!!
by Tymont January 03, 2012

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