Ha-ha

n.

1.

A sunk fence; a fence, wall, or ditch, not visible till one is close upon it.

Noun	1.	ha-ha - a loud laugh that sounds like a horse neighing Synonyms: haw-haw, hee-haw, horselaugh
	2.	ha-ha - a ditch with one side being a retaining wall; used to divide lands without defacing the landscape Synonyms: sunk fence, haw-haw

haw-haw, hee-haw, horselaugh, laugh, laughter