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The period of time after a set time at which it is no longer socially acceptable to call someone. Usually around 9-10 o'clock. Only to be violated in periods of extreme urgency. Originally coined by Larry David on, "Curb Your Enthusiasm"
Person 1: Oh shit, I forget to tell my friend that he has to meet me at noon tomorrow.

Person 2: Too late now, it's past the cutoff time.
by Specialnator July 22, 2010
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2
The point reached in the day when it's too late to get any from the opposite sex. Usually applies after a long day at work.
Boy: Girl, I know you alone tonight.
Girl: It's cut off time. Hit me on the weekend.
by CreeperStash January 28, 2008
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