A non descript exclamation which usually accompanies alot of hooting and whistling at whatever is causing the excitement. Most likely coined in the southern states of north America (eg Texas). Can also be used to punctuate traditional country and western music.
It might also be exclaimed by the rider of a bull or bucking bronco at a rodeo or their spectators.
Oft conflated with gee haw: right and left, respectively, TWO commands for controlling a beast of burden with respect to the current path. The current expression is the result of the phonologically entertaining velar abandonment of gee /dʒiː/ for slothen vowel yee
"YEE," let's not fall into the fathomless crevasse. "HAW," let's not flip the caravan riding up the embankment. Yee Haw itself is befuddling
"After an upsetting third place at the Iowacaucus, Howard Dean made an unforgettable yee haw that was played around 700 times on CNN within the next 24 hours."