one-a-day

A beneficial defecation regimen.

It never fails, when I travel my vitamin (one-a-day) routine is impeded.

by machBailz May 17, 2007

A one from day one

Someone who’s been with you since the beginning and generally supports you. (Could be from the beginning of a certain period of time or situation.)

My Mom has been with me all my life. She is my A one from day one.

John is my A one from day one. We started this job at the same time.

by LiteBrite169 December 22, 2021

national day one day

The day you appreciate your “Day one” the friends that has been with you since the beginning and never stabbed you in the back

it’s national day one day show some appreciation to the friend that’s been there since the beginning

by DrFitzSlurp July 2, 2023

One day

a period of twenty-four hours as a unit of time

I will give ridderp ownership of the discord server and all of Luigi's coins one day.
-Amshan

by valorant or something idk November 28, 2020

One Day

A fictional date in the future where you will complete all of your backlog and optimizations

One day we will add unit tests

by PaulICS123 November 4, 2021

Four Seasons In One Day

When your shit starts out runny, then gets solid and then gets watery or any combination of the above mentioned

My favourite type of Shit is the Four Seasons In One Day

by UncrunchableCorn February 26, 2025

one day period

Your vagina hates you it's gonna be okay

I had a One day period... some girls thought I was blessed... turned out... I'm dying

by Queen of knowledge March 11, 2017