Nineteenth century British Army slang for "ugly bugger", used to describe the natives of the Sudan.

A startled individual.

an unintelligible slur to describe something/anything that is otherwise inexplicable. For example, when confused, baffled, and/or compounded over a situation–one may exclaim, "OOGA, BOOGA!"

Also, one may cry out "OOGA BOOGA" when nothing else seems appropriate. For instance, let's say you're chasing someone (to scare them, or startle them, or even just to engage them in chase), one may call out "OOGA BOOGA" as sort of a declaration that one is there, present, and aware and on the tail of something/someone.

The cool noise crash-bandicoot's mask makes.

Buttsex, mainly by islanders.

1. when speaking, your mind sometimes cant find the word you are trying to use to describe another thing, so you put ooga booga in its place. everyone will know what you're trying to describe without even saying the word.
2. often times when in a game (volleyball as an example)you are losing real badly so when the opposite team is up to serve silently whisper as a team "ooga booga" right before the server comes in contact with the ball.
there is a 95% chance the server will hit the ball incorrectly or miss, giving your team the ball and the point.
(prooven, my volleyball team tested it out at a real match)

ugly girl normally fat nasty does not take care of herself at all, most likely very unattractive