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.
Joe: Let's go to the mall and chill guys!
Everyone else: YEAH! IT'S NIGGA TIME!
The reason black people are usually late.
Guy : Yo how long untill you come?
Jamal: Like 15 minnutes
Guy : ok
(2 hours Later)
Guy: Yo where you at?
Jamal: Im on my way now
Guy: Daym you is on some nigga time
When Franklin from GTA 5 uses his special driving abilities.
Use nigga time to avoid that cop car in front of you
when a person has a lot of time to smoke weed.
Nick Calantoni first came up with the word in 2006 so it is a fairly new term.
Otto: I got 5 hours till my mom picks me up.
Nick: Oh, you got nigga time