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DEF. 1) The time period from 23:00 to 00:00.
DEF. 2) The last hour before a deadline.
DEF. 1) Manchester is never deserted; Not even during Cinderella Hour.

DEF. 2) My technical report is due and I've got 22 minutes until Cinderella Hour.
by hypertoot May 14, 2009
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The deadline to get an inebriated sexual partner home before they turn into a pumpkin, which occurs when they pass out drunk before you can seal the deal.
I'd love to stay at the party but I need to get Beth home before the Cinderella Hour.
by Pauls2theWall April 28, 2016
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