A abbreviation for the phrase 'laugh like Niall'.
Originated because of the adorable laugh of Mr Horan, only Irish member of the British/Irish boyband, One Direction.
'lol' was becoming too frequent in the 1D Family so Directioners now use the phrase lln instead.

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

Laugh Like Niall

Niall Horan is the adorable leprechaun who can laugh for hours about anything <3

Laugh Like Niall. Used by fans of One Direction(Directioners) in replacement for LOL. Created April 28, 2012.

Normal people: LOL - Laugh Out Loud.
Directioners: LLN - Laugh Like Niall.

LNN can also mean LAUGH LIKE NIALL if you're a Directioner.
So,if you see this word on One Direction pics it probably means that.

If you are a directioner, and something is ridiculously funny, you LLN.. Laugh Like Niall

Laugh Like Niall. Niall as in the hot blonde from the sexy homosexual band One Direction. Niall is known for his amazing laugh, so some directioners say LLN instead of LOL.