How to Write an Insult of a Fictional Character?

Hey guys! So I am writing a fantasy story and I need a little advice. I, the author, don't like one of my characters. He is my least favourite out of all the characters in the story. I have decided to express my dislike through the dialogue of other characters and I was wondering how to do that properly and efficiently. <br><br>For example, let's say that I want write a sentence like this one: "You're ugly, stupid, rude and obnoxious. Ewww, why are you even alive?" This sentence is a bit too on the nose and doesn't sound like a real insult. I am looking for something clever, something that will make the readers laugh and make them remember. <br><br>So, how to write a clever insult that actually sounds like a real insult rather than an expression of dislike from the author?<br><br>And I don't want to write a regular, run of the mill insult. I don't want to just call the character an idiot or a moron or anything like that. I, once again, want to write something clever, something that will show my character's intellect or lack thereof. Just calling him an idiot won't work.<br><br>For example, let's say that the character in question is a knight of the round table, he is a noble knight who is next in line to the throne. He is a chauvinist and is very obnoxious and rude. How would you write an insult towards this character that incorporates the fact that he is a chauvinist?<br><br>I don't know, I hope this made sense. I just want to make this character as unlikeable as possible. Thank you.