In the episode where Bart has his apendix removed and Bleeding Gums dies.
Bart: If I die, you will be in a lot of trouble.
Mrs. K: Nope, it is specifically stated in the school rules that I am ok if bart simpson dies…It also absolves me if the school python eats milhouse.
Milhouse shape in snake: Cool! There’s a rabbit in here!
The Canine Mutiny – Episode 4F16
Bart gets a credit card under Santa’s Little Helper’s name and buys a collie from Vermont named Laddie. Laddie is a wonder dog and everyone loves him. When the Repo Men come back to claim all the items Bart made on his bogus credit card he says that SLH is the dog he ordered and not Laddie. So SLH is taken away, but Bart starts to miss SLH…
Bart: Guess I was the only one who loved him.
Milhouse: You got that right. Remember the time he ate my goldfish? And you lied and said I never had any goldfish? Then why did I have the bowl, Bart? Why did I have the bowl?
Here’s a good one:
Bart: How could you let the factory fall over, Milhouse!? I thought you were watching it!
Milhouse: I was watching it! It started to fall over…then it fell over.
Also, in the “Behind The Laughter” episode, the text on the side of the teaser says things like “SEX, DRUGS, MONEY, CORRUPTION, BEER, CANDY, MILHOUSE.”