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Jet dick Lag is a term meaning a man's penis cannot adequately alter from flaccid to erect in pursuit of consenual intercourse with his partner after a long journey which has left him mentally and physically exhausted.
Guy 1: I traveled from Dubai to Rio de Janeiro to see my girlfriend, we were 1 year without sex and when I arrived she wanted sex so bad, but i wasn't in the mood.

Guy 2: Dude, You had jet dick lag!
by ladyurie April 29, 2011
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