He's a paranoid delusional furball.
4 seconds sound clip from the Monsters, Inc. movie soundboard.
You can hear this line at 00:48:46 in the Blu-ray version of the movie.
Quote context
[...]
- Look, Sulley, you wanted her door and there it is.
- You want me to prove everything's on the up-and-up? Fine!
- He wants the door, I get the door, he don't want the door.
- He's a paranoid delusional furball.
- Mike!
- Hey, Sulley, where you been all day? Sulley? Sulley?
- Huh? Mike? Mike? Where are you? You in there? Where are you, buddy? Mike?
[...]