Noun. The act of waking up in the middle of the night to have buttsex.

Similar to and derived from the phrase "midnight snack," which is food eaten late at night. However, reverse midnight snacks go into the area where normal midnight snacks leave.
Jenna: Sometimes, I just get in the mood at really bad times.
Joe: I know what you mean... I woke up in the middle of the night and was just so horny. Luckily, Dan was there to give me a reverse midnight snack.
Jenna: I'll try that out! I've heard that it hurts but it's still worth the pain.
by MS POPO December 11, 2013
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