When people are trying to be different, so they don't say lol which means laugh out loud, but instead say NLS which means 'NOT LAUGHIN, SMILING' meaning they are not laughing out loud, just grinning, often used when not even smiling.
Acronym for a Negro Law Suit. A Negro Law Suit is a suit that is brought by a member of the negroid race over some made up or perceived injustice against a business or institution to try an extort a large sum of money.
Laquisha had trouble finding a law firm to take her NLS against a hotel who had denied her use of the swimming pool because she wasn't a paying customer.