What does Au-ooooo mean?

Au-ooooo meaning in Urban Dictionary

1. The sound Donkey Kong makes upon doing their taunt in extremely smash brothers. Frequently followed by a shrug associated with the shoulders and a rocking back and forth for the head2. An imitation associated with the overhead done to many other people, frequently to trigger anger as you are throwing their butt with Donkey Kong in Super Smash Brothers.3. Au-oooooo!?