Jajajajajajaja!

From Euphro

Onomatopea usually attributed to the sound Brazilian players make when they laugh, in contrast to the English-speaking player's "Hahahahahahaha!". Other players of Latin American sometimes use the same onomatopea ("Jajajajajajaja!") to symbolize their laughter.

"Jajajajajajaja!" can also be subsituted freely with "Huahuahuahuahuahuahua!" and viceversa.