A not entirely innocent sleep over at someone else's house, generally occurring after a night out when one is not entirely forthcoming about their late night sleeping arrangements.

Used most often by girls who are slightly embarrassed about their activities.
Katie: Suzy, did you have a nap over at Tim's last night?
Suzy: (blushes) yip (giggles)
Katie: (giggles)
by Danthewise December 14, 2012
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