A barbecue made out of a rusty barrel cut in half. Also known as a Pork Scotch Oven this shitty type of barbecue is most commonly used by little fat men with horrifically ugly girlfriends.
Thought you said the little twat had a barbecue.

Its over there, look. A half-barrel barbecue. Its a barbecue for complete losers.
by Kenny Spoffo-Grumpbeetle August 6, 2009
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