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1.
In spanish the "j" sounds like an "h" so its like "hahahaha" but spelled the spanish kind of way "jajajaja".
Person A, Person B

A: *tells joke*
B: LOL!! Jajajaja!
A: Yay! I'm funny!
by billy bob kozminski May 02, 2006
 
2.
spanish for "hahahaha"
when juan laughed the sound came out as jajajaja, which is spanish for hahahaha
by taylorjackson July 27, 2007