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.
Whilst at the rodeo the rider of the bucking bronco yelled;
jerk1 ( P ) Pronunciation (ass-jûrk)
v. assjerked, assjerk·ing, assjerks
1. The fast and furious movement of the bowles.
2. The conjoining of asshole and jerk indicating very poor behavior.
3. I was driving along the road when I got assjerked but some crap driver.
4. Those guys are such a group of assjerks.