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to have sex with an individual or group after the time originally planned.
Their encounter was getting hotter, but "Lost" was on, so Jim was forced to postbone his girlfriend until after the show.
by outrageous-fun April 15, 2009
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3
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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