'hee-haw' definitions:

Definition of 'hee-haw'

(from WordNet)
noun
A loud laugh that sounds like a horse neighing [syn: hee- haw, horselaugh, ha-ha, haw-haw]
verb
Braying characteristic of donkeys [syn: hee-haw, bray]

Definition of 'hee-haw'

From: GCIDE
  • hee-haw \hee-haw\ v. i. to bray in the manner of a donkey.
  • Syn: bray. [WordNet 1.5]

Definition of 'hee-haw'

From: GCIDE
  • hee-haw \hee-haw\ n. a loud laugh that sounds like a horse neighing.
  • Syn: horselaugh, ha-ha, haw-haw. [WordNet 1.5]