Girl who repeatedly shows up at your house, mainly after you have already gone to bed and wakes you up for sex.
Night slut: "Colin guess what I am?"
Colin: (was sleeping. . . recently awakened) "A night slut!"
Night slut: "YOUR MEAN!" (then gets naked and crawls into bed for sexy time.)
by Neg Burgerbowloff May 18, 2007
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A night in magaluf when a girl has rampant sex with multiple guys.
Lydia had sex with so many guys on slut night that she couldn't walk for a week.
by Bantergod1 February 17, 2014
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