NFL means "Northside For Life", stemming from NBA YoungBoy/YoungBoy NeverBrokeAgain. Relating to his affiliation to the Northern side of Baton Rouge, Louisiana.
"NBA YoungBoy is NFL"
Pretty plain and simple Niggas For Life
Me: What's up my nigga
You: You got my back right?
Me: Hell yeah, NFL
Natural.Fluff.Level it can be used to describe many things but they all revolve around the fluffiness of that thing
National Fuck/Fucking League.
An event where fuckers fuck one another to get scores and win the game.
An abbreviation for Null Factor Law, a mathematical method where you can assume that one multiple of x is equal to zero when the equation is equal to zero.
Person 1: "How do I solve this equation?"
Person 2: "Use NFL."