After a hard days work you arrive home and find your day is incomplete. Therefore you have a wanknap - taking a mere half an hour. Afterwards you are recharged and reinvigorated.
by The Bladesman March 3, 2007
the ability to have a wank, or "work the gerkin" in bed, proceeding sleep. This happens when one is still holding ones todger. You fall asleep whilst holding your cock on!
by humpy1 May 15, 2009