When you've had too much to drink and you're stood up, taking a piss (where ever that may be) and suddenly you feel like throwing up, and do so while looking directly down.
John: "You guys won't believe what happened to me last night. I had so much to drink that I couldn't even hold it in while taking a piss."

Dave: "Sounds like you had a serious case of vomit cock."
by [Chaz] December 16, 2008
5 Words related to Vomit cock

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