an exclamation of excitement originating from cat Twitter. It is intentionallymisspelled, as is most English on cat Twitter, to convey the illusion that it was typed by a cat.
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 . . .!