Combination of the abbreviation for, rolling on the floor laughing, and the "snork" sound, Tim Conway made during a skit on the Carol Burnett Show, mimicking two Siamese elephants joined at the Trunk , when attempting to Trumpet.
Used as an exclamation reply to something funny in text or chat:
Person A) "The first time I got a universal remote, I thought to myself, this changes everything."
Person B) "roflsnork!"
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!