Boy, you've really done it this time. If you're searched up this term that means the old man's pissed and he ought to give you a good slugging. "Why I Ought To" is used in the darkest of times, and is usually a last-resort in situations like this. So, next time you hear this, alert the authorities or flee the scene at once, for your very life may hang in the balance.
*Boy spills milk all overthe table*
Father: Ah! You've gone and done it this time, Mister! Why I Ought To . . .!
Redefined by the youths of Beverley, East Yorkshire and the surrounding area, oust is a general exclamation that can be used in a variety of circumstances. It can be used as an expression of greeting, or as an insult. It can also be accompanied by a click of the fingers, followed by pointing at the target of the word. People who are ousted in this way are generally geeks with no friends, as they are an easy target for abuse.