ride and die 

A person, usually a best friend, who expresses their friendship to the max whereas one person would even die for the other. There are ride-n-die chicks which a boy usually claims a close female companion or girlfriend type but with closer bonding. A true ride-n-die person shows extreme affection and admiration towards the other ride-n-die, doing everything and anything for the opposing person, including getting in trouble, dying for them, or giving up everything for their friendship. A ride-n-die is the highest level of companionship.

Fefe: Damn Bonnie and Clyde, those natorious theifs, were killed together I learned today in history.
Jayla: Yea, they loved each other, robbed with each other, and died together. They were true ride and die.

Omar: Man Jane, you like my girl but a my nigga at the same time.
Jane: Yea I figured
Omar: You ma ride and die chick forreal.

ride and die by Newport Boo 813 May 6, 2008

ride and die chick 

The kind of chick that you would marry. Shes always there for you

Person 1: "Damn, my chick is a ride and die chick. She's always there for me."
Person 2: "That's good"

ride and die chick by slangsmooth December 12, 2015