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Just like the munchies you get from being high, this is getting very hungry after having some really good sex.

This mostly happens to guys after a good fucking session. This ensures you sleep well- satisfied x 2 !
Late at night:
"Are there some sandwiches still left in the fridge baby?*
"Yea I gat the Sex Munchies too John, get me some as well."
by Ntee August 10, 2013
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3
The appetite worked up from having rough, energy-consuming sex.
Damn, you fucked me so hard, I got the sex munchies now.

Or
Okay now that we're done having sex, I'm starving. I totally have the sex munchies.
by Jmtmnt March 03, 2015
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