A Midnight Snack is when you're woken up, from a dead sleep, at any time between 12 am and Sun-up (it has to still be dark out) with terrible diarrhea caused by the last meal you ate before going to bed.
If you are woken up with Shit Cramps, a Midnight Snack is almost certain to immediately follow.
Bro, I ate WAY too much Chinese food. I'm definitely gonna wake up for a midnightsnack tonight
Having company over for some adult time in the middle of the night without staying over. When somone comes over for seggy time ridiculously late at night. Snacking late
Casual sex. Occurs when you're tired, and ready to got to bed, but first you want a little something warm in you. Non-discriminatory, as long as it doesn't have mold on it and the expiration date is good you are will take it.
NOTE: Not to be confused with dinner sex. Something that's planned and prepared for, and you have to pay a little money for.