Why you little!

"Why you little!" is one of Homer Simpson's catchphrases almost always followed by Homer angrily strangling his son Bart Simpson for whatever reason he was provoked, usually Bart verbally insulting Homer. In some episodes Homer doesn't say it before furiously strangling Bart but instead says something different (i.e. in "Blood Feud" when Homer learns Bart already mailed his letter to Charles Montgomery Burns, he angrily says I'll show you mad in the morning!). In some cases, even though he yells the catchphrase or a similar wording thereof his target is actually someone else and other characters have said this on the show before. In other cases, he directed the phrase or variants thereof to someone other than Bart.

In the fifth season of Star Butterfly Edition in present, now is one of Marco Diaz's catchphrases almost always followed by Marco angrily strangling the dog Dudley Puppy for whatever reason he was provoked, usually Dudley verbally insulting Marco.