The meaning of hny is “happy new year”.
It is the perfect way of wishing a happy new year to those one doesn’t truly care about (bosses, old classmates, exes), all in three letters.
So simple, that you have a high chance of typing it correctly even if you are wasted out of your brain on New Year’s Eve.
Its origin can be traced back to the 90’s or early 2000’s, when SMS technology and the internet were introduced to our lives.
Back in the day it was mostly seen in text messages, though it may have been found on chatrooms and message boards, and even early social media sites like MSN or MyVIP.