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Sexually active. Gretna describes a girl who enjoys the pursuit of receiving cocks. Derived from the Scottish football club of the same name which briefly went into receivership before liquidation.
Raging paedo: "That bird is pretty young, do you think she's gretna?"

Raging paedo's informant: "Fucking right she is, it's like a badly packed kebab down there!"
by nudge and nurdle October 18, 2009
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