look up any word, like bukkake:
 
8.
an over-used phrase on AIM.
screenname1: omg he is so cute.
screenname2: haha.

see... no need to laugh.
by 13heatha June 09, 2008
 
9.
something very funny
that guy just magurted too much beer and fell over with a dopey grin on his face. it was pretty ha ha.
by george tedbetter September 23, 2006
 
10.
another way of saying "I don't give a shit"
person1: I made a really good sandwich yesterday.

person2: "haha"
by my pseudonym? ok March 23, 2011
 
11.
Half
Assed
Humor
Attempt

'nuff said
Person 1:yo mama's so fat whales sing we are family
Person 2: At least it was a H.A.H.A.
by hiddenmeaning May 01, 2009
 
12.
Definition 1:
Haha - used to express laughter anywhere you can't say it, for example IM, instant messaging or via email.

The minor difference between haha and hehe is that haha is often used when laughing at someone, while hehe is used while laughing with someone. It might be unconcious to most people, but it's true.

Definition 2:
Ha-ha - when haha is pronounced like 'Ha-ha', it often expresses that one do not find something humourous; ironic.

I also found some pretty random ancronyms for haha online:

Having A Heart Attack
Houston Area Hound Association (Texas)
Human-Anti-Humanized Antibodies (immunogenicity testing assay)
Example 1 (haha): You don't know who Shakespeare was? Haha!
Example 2 (ha-ha): Ha-ha, how funny!
Example 3 (hehe): Hehe, you're so funny!
by Ronny Løkken October 21, 2006
 
13.
Hot Asian Hot Asian
Mike thinks Christina Kim is a HAHA
by Boston Polito November 01, 2009
 
14.
What you say when something either isn't funny at all, or if you aren't paying attention to the conversation.
XxXL0LZXxX: OMFGZZZZZZZZ THEN HE LIKE FELLLLL OFF THE ROOOFF OMGG LMFAOOOZ!
oh_wow:haha.


xX0smexynesss0Xx: So that's when my mom fell on the floor and died.
i_don't_care: haha.

by jamieeeeeeeeeeeeeeeeeeeeeeeeee December 18, 2008