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An unexpected erection experienced by all men during a sufficiently long period in a vehicle.
Guy 1: 'Dude, why you sat like that?'

Guy 2: 'Travel cock again'

Guy 1: 'Ah man, I had that ten minutes ago too'
by shmurnt August 08, 2009
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2
The excitement that occurs upon a journey and turns your cock hard as a rock.
Daniel: Bro, are you excited for this road trip or what?!

Jacob: Dude, i've got the craziest travelcock!

Daniel: Steaksauce!
by Jam Jam Ziegler September 24, 2008
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