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).
: even made a ha-ha pass at him/ ha-ha candles made to look like penises
A joke; something funny; stroke of wit: That's a ha-ha all right
[1940s+; ha-ha represented the sound of laughter by 1000]