hee-haw Syllabification: (hee-haw)Pronunciation: /ˈhē ˌhô/Definition of hee-haw noun the loud, harsh cry of a donkey or mule. [as modifier] informal relating to or denoting unsophisticated rural humor and attitudes:hee-haw manners verb [no object] make the loud, harsh cry of a donkey or mule. Origin: early 19th century: imitativehee-haw in other Oxford dictionaries Definition of hee-haw in the British & World English dictionary