What about "Hahaha" or "heeheehee" or even "hohoho"... no?
Wario Forums
Robin
ThAshleyChannel
Well, MonaWare does say "Haha" a lot. Same with Lol and HueHue, haven't seen much people say Hehehe or Hohoh, lol.
Robin
Hohoho says Santa Claus
King Hehehe
I feel like Hehehe tops it all, though.
ThAshleyChannel
Ahhhh, I see what you did there.
MonaWare
Haha definitely wins : p Its like THE definitive laughter ummmmm..... onomatopoeia? (no idea what the word would be....)
King Hehehe
You got it right. Onomatopoeia.