Top definition
a girl who's nice sweet and really really cute. also a good nickname for girls who's names start with a day and girls who bring daylight into your life.
you:hi dayday
girl: hi
by cybeR15 April 26, 2013
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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2
DAY DAY is a person in jail and he needs to be free
Free my boy DAY DAY
by Relaxeres May 08, 2020
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3
a lazy ass hoe that can't get a licences so she give bj's to vatos for a ride.
"Damn. Let's go holla at that Dayday."
by shinnin September 07, 2006
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4
Dayday is a pimp daddy who is really funny and it the coolest person alive and has a retard friend named Jacoby
Dayday is bae
by Dayday Doughnut August 28, 2018
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5
A cunt that nobody likes. People that call there self Dayday are usually autistic
Dayday is a dumbass
by Dayday_ August 20, 2018
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6
Mum: It's time for your day day Jonny
Jonny: Day day mummy
by JB42 October 09, 2011
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