roflbomb 

An explosion of uncontrollable Laughter among a massive (or not so massive) group of people. MP

I dropped a massive roflbomb on the kids around me. They lawled all over themselves as a result.

roflbomb by Matt Perez November 24, 2007

roflbomb 

Idea or Situation (Joke, person falling, etc) that cause wide spread laughter over a small area of people.

i told the llama joke and dropped a roflbomb on my friends

roflbomb, that guy just fell down the stairs.

roflbomb by The Juggernaut, bitch November 24, 2007