haha

interjection, noun

1. (used as an exclamation or representation of laughter, as in expressing amusement or derision.)

noun

1. sunk fence.

interjection

1. a representation of the sound of laughter
2. an exclamation expressing derision, mockery, surprise, etc

noun

1. a wall or other boundary marker that is set in a ditch so as not to interrupt the landscape

also haha, used of laughter since ancient times; cf. Old English ha ha, Greek ha ha, Latin hahae. A different attempt at representation is in py-hy (1580s).