The day after a night of excessive binge drinking of alcohol, in which one is so hungover that the activities/responsibilities for the day are similar to that of an infant. Namely, eating, sleeping, and shitting.
Mikey- "Holy shit, I feel like hell today from drinking all those 151 and Coke's."

Me-"Dude, looks like you're gonna have a Baby Day."
by Jimbo Slice 60 June 22, 2010
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When a couple hangs out on a Tuesday and Tuesday only.
Do you want to hangout with ado today?
No he's with his girl, it's babies day.
by Pooooooonbrrrick December 7, 2021
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Everyone has to wear footie pajamas and act like babies for the day
Hi dude
Goo goo ga ga

Why are you wearing pajamas

It is national baby day
by Taco5435 April 4, 2021
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Happens once a year a very important holiday for everyone to share on the on February 4th
OMG ITS DA BABY DAY ITS TIME TO CHANGE MY PROFILE PICTURE
by I will be known November 3, 2021
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The 22nd of February is National Meth baby day. Created by a small group of psychology nerds and one math nerd. A misinterpreted Math Babies became Meth babies. Now leading to Meth baby fights.
“Hey, why are those babies fighting?”

“Oh it’s meth baby day.”
by John.D.Fitzgerald February 24, 2023
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Every 11th of January you maybe kick any baby without getting arrested
It's National kick Babies day
Approach the baby kick the baby, baby goes '' ahhhh''.
by D3n1ss January 2, 2021
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national hyunjin babie day is on june 4, spread the agenda
national hyunjin babie day is on june 4
by viralhyunjin November 4, 2019
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