to masturbate.

Can be used as a noun or verb.

Based on the results from the healthystrokes.com survey which reports the average man masturbates 7.2 times per week, or just about one-a-day.
"Sorry I took so long in the shower, I had to do my one-a-day"

"I just one-a-dayed all over the keyboard, anyone know how to clean that up?"

Jack: "Hey dude, why are you so whiny today?"
Jim: "I know, I'm so stressed out"
Jack: "Did you one-a-day yet?"
Jim: "Not yet! BRB ;)"
by reddan69 January 21, 2012
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a chinese idiom that is used when you miss someone so much,
one day feels as long as three years.
When I'm without you one day feels like three autumns
by cakeloufornia May 17, 2015
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A person who has been down with from the first day y'all met even thru good and bad
Psycho is my day one homie since the early 90's
by Shadow24 December 30, 2016
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A Song from Dixie D'amelio, a girl who got famous because of her sister. It's one of the most basic white girl songs on the planet and has terrible auto-tune
"You know the song 'One whole day'?"
"oh you mean the one by dixie d'amelio? yeah it's terrible"
by v0lts January 09, 2021
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A female partner who has stayed with you for a long time through good and bad times.
Happy birthday to my girl and my day one, I will love you till the end
by JDub555 April 14, 2016
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People say that everyone is their day one. Well fix urself cuz u got it wrong. Day ones are people that have been best friends since birth or for several years.
Man 1: yo I got so many day ones dude like their everyone.
Man 2: nah dude, Olivia and Isabella are day ones they've literally been best friends since kindergarten. So no you gotta fix urself.
by Karen_Hit The Whoa October 05, 2019
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