an over-used phrase on AIM.
screenname1: omg he is so cute.
screenname2: haha.

see... no need to laugh.
by 13heatha June 9, 2008
Get the haha mug.
The most fucking annoying four letters in the whole goddamn world.
Person 1: hi haha
Person 1: the movie was good haha
Person 1: im eating fucking ramen right now and no one cares haha
Person 2: If you say "haha" one more fucking time I'm going to buttrape you with a cast-iron cactus HAHA
by FappyMcAnus January 25, 2014
Get the haha mug.
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
Get the haha mug.
Something one says when one finds something funny.
"Haha" She said, after I told her a joke.
by Greeeen Frog August 7, 2012
Get the haha mug.
A) Another way of displaying humour
B) A mocking term used in multiplayer games when a player has done something amusing.
A) "haha that was funny"
B) *Player has killed self with a grenade*
Player: oops..
Player(1): haha
by future X March 23, 2003
Get the haha mug.
It's a ditch, next to a small wall, used to keep livestock in.
I returned my sheep to their haha.
by sarah January 26, 2005
Get the haha mug.