Thanks! 
I’ve got a new one - in Ratatouille, when Linguini is giving his ‘rousing speech’.
“Anton Ego is going to…order something… from our menu. And we’re going to cook it…unless he asks for something cold.”
“Appetite is coming… and he has a big ego”
Cracks me up every time! 
Yeah, that’s hilarious 
That Ratatouille scene makes me laugh, too!
And now, some more of my favorites:
Spanish Buzz (obviously)
tractor tipping
EVE trying to dance
the circus bugs entertaining the grasshoppers
Riley’s dream sequence…and Fear is watching it
that teaser trailer for Monsters University (if it counts, that is!)
“Brain freeze!”
pretty much every episode of Mater’s Tall Tales
Will have to come up with more of them on my list some other time…it’s getting late over here.
I can’t go to class! I’m not wearing any clothes!
^Um, what is that supposed to be off of? 'Cause I don’t remember actually hearing that in any Pixar film…
That’s from the MU teaser!
^Darn! I liked the one with, “My pony made the dean’s list.” (also MU teaser)
Another one I can think of…from A Bug’s Life:
“PT, look. Money!” “Where? Ahhhhh!”
(I’m actually watching the movie right now and approaching that scene)
It’s not actually a part of the movie, but I feel the promo animation for Finding Nemo deserves to be mentioned here.
“I remember squat. Diddly squat.”
Pretty much every single Finding Dory scene featuring either Hank the Septopus, Gerald the sea lion, and/or Becky the loon 