night's over

Polite way to let a friend know that you need to leave some place fast because you LITERALLY shit your pants (sharted)or FIGURATIVELY shit the bed. If you just farted up the joint and need to leave you might say "night's over" as hyperbole.

a: Night's over.
b: Why?
a: I pooped my pants so lets get outta here fast.
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a: Night's over.
b: Dude, we didn't eat all day, how'd you shart.
a: I didn't shart, I just got rejected hard by the shot-girl, though, so we gotta bust outta here.
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This derives from the classic line in the movie 25th Hour: "Night's over. I sharted."