Definition of "NFL"

NFL

/ɛn ɛf ɛl/

proper noun
1. (American football) Initialism of National Football League.
2. (American football, humorous, derogatory) Initialism of National Felon League.
3. Initialism of Newfoundland and Labrador.
noun
uncountable
1. (mathematics) Initialism of no free lunch: applied to various restricting theorems.
  Quotations
  First off, let us be clear that the No Free Lunch theorems that underwrite the displacement problem apply with perfect generality—NFL applies to any information that might supplement a blind search, and not just to fitness functions.
  2002, William A. Dembski, No Free Lunch: Why Specified Complexity Cannot be Purchased Without Intelligence, Rowman & Littlefield, page 204