When you find yourself in a date with someone who bores you to the point that you find yourself asleep with your eyes open.
Paige: Dang, the guy last night who took me to dinner was such a bore. He caught me datenapping right during the entree.
Jill: Ya, I always used to suggest movies instead of dinner, in the event the guy was a loser, so I could catch up on my datenaps, especially if I did not get my meetnapping that day at work.