When you wake up in the morning with the sheets raised due to a stiff one!
Hey Rob, did you get a sheet shark when you saw Danni walk up the steps?
by barnscar1 August 12, 2011
Waking up with a morning throbber while your partner is asleep still, you try to sneak your hard one into her ass while the sheets are still in front of you.
You want sex but you know she will not want you to wake her so you go for the fast kill and try to slide it in, but you get caught by the sheets(Sheet shark)!
by Johnny Hammer January 02, 2009