Day one nigga 

A Nigga who never switched up on you.
-<someone who hasn't changed since you met them>-

He stay on some real shit homie, that's my day one nigga tho

Day one nigga by A Day 1 Nigga June 20, 2016

Day One Nigga 

A person who has been completely down to earth and friendly with you since you first met them, they're your nigga since day one.

Kodi and I go way back, we've been friends since first grade. He's my day one nigga!

Day One Nigga by Krelgore June 21, 2013