look up any word, like darude - sandstorm:
 
1.
1.) Laughing at something that's not even funny so you don't seem rude.

2.) Laughing in order to avoid awkwardness.
Person A: Did you see that music video on Youtube about Humpty Dumpty? What a CRACKhead!
Person B: Haha. (Conversational chuckling)

Person A: Dude, look at that girl's sunburn!
Person B: Hahahahahahahaha! (Conversational chuckling)
by socialbutterflyer June 20, 2011