hhh

Etymology
First sense is onomatopoeic.

The second sense is an abbreviation of.

Interjection

 * 1)  distress, discomfort, boredom or confusion.
 * 2) ; haha, LOL, LMAO.

Usage notes

 * (laughter sense) Just like, hhh may be elongated to express more sincere or expressive laughter, e.g. or even more exaggerated, hhhhhhhhhhhhhh, etc.