The reason black people are usually late.

Engaging in a specific activity that you and your friends do a lot (considering "nigga" can be used to refer to someone as a close friend or "homie"). Generally to be shouted or yelled as you are entering a vehicle that will be taking to that activity.

Say, going to the mall.
Though, not to be said around black people.

When Franklin from GTA 5 uses his special driving abilities.

Time for ur homies

Refers to when a person, usually of black decent, loses control of his/her scenes and begins to commit niggardly acts.

When a bunch of cops get killed by a nigger

RNT for short. An adjective that indicates any copacetic or extraordinary action. In other words, any noteworthy behavior that is gangsta or trill AF. Finally, a duration that every person strives towards, but few attain.