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1.
A particular form of a push-up in which someone does the exercise with their body facing the ceiling instead of the floor, and the person is trying to push their back up from the floor, rather than their stomach.

Despite requiring about the same amount of strength and effort, this exercise is much less common than regular push-ups.
James: I can't do push-ups. They're just too difficult.
Michael: You should try reverse push-ups.
James: Dude, nobody does that. You realize how many weird looks that'll get?
by A Person Named September 07, 2013