When during a year, a guy or girl ends up staying up past midnight and eating a lot and not being able to exercise outside due to it being super late, they end up gaining 15 pounds or more. It's usually eating junk food and you even cook stuff that's not the healthiest, but usually super tasty stuff.
*midnight
Fernando: I'm cooking Mac and cheese with hotdogs in it. Mmmmm.

*eats it.

(Next day)

*Midnight
Fernando: I'm cooking chicken chili with beans and some popcorn.

*eats it

(Wednesday)

Fernando: I'm cooking and eating a salami and cheese sandwich with a 20 oz Orange soda. Also, a bag of chips.
*eats it

Fernando: Crap! I can't go to the gym at midnight.

A year later.

*gets scale
*Gained 29 pounds.

Fernando: Aw man! The midnight 15 is real!
by HawaiianPunch1 June 23, 2023
Get the Midnight 15 mug.
When you stay up past Midnight and eat and cook unhealthy junk food, can't exercise because it's late, and you end up gaining 15 pounds of more in one year.
*Midnight.

Tom: *eats the refrigerator.

*one year later.

Tom: Hey Tyler! I keep eating at night and gaining 25 pounds.

Tyler: Sounds like Midnight 15.

Tom: Stupid Midnight 15!
by HawaiianPunch1 June 24, 2023
Get the Midnight 15 mug.