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A "person",event or story so outrageously unique, ridiculous or hideous that the only place in the world it would occur is in Gloucestershire. For example, Gloucester Wierdos and Cheese Rolling
Went up Glostee town last night, It was like a Halloween Safari

Haha Only In Gloucestershire (O.I.G) sounds like you saw some right OIG's (Gloucestershire Freaks)
by Forester Mo April 18, 2011
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