post-breakup sex with an ex.
yeah man, they broke up 6 months ago and charlie is still postboning his ex.
by kmarie January 7, 2008
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To reject an evening at the pub with your mate in favour of a dalliance with a plucky lady who's offering to play your pink flute
Looking forward to tonight Andy?

I was til Bloody Paul decided to postbone cos he's off on a promise with Gladys!!!
by Scarey71 November 29, 2017
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