Don't forget The Rat Pack.
Rat quotes (from SFGate):
1. "Not mouse, never mouse. If anything, rat!" - Bette Davis as Margo Channing in "All About Eve"
2. "That's not a rat. That's my ferret." - Jennifer Aniston as Polly in "Along Came Polly"
3. "The rat rules!" - Templeton in "Charlotte's Web"
4. "I got this rat, this gnawing, cheese-eating, f- rat, and it brings up questions."- Jack Nicholson as Frank Costello in "The Departed"
5. "Come out and take it, you dirty, yellow-bellied rat." - James Cagney in "Taxi!"
6. "If you wait, a rat will always lead you to its hole." - Sayid on "Lost"
7. "His idea of great R&R was cold rice and a little rat meat." - Martin Sheen as Willard in "Apocalypse Now"
8. "You learn two great things in your life. Look at me: Never rat on your friends and always keep your mouth shut." - Robert De Niro as Jimmy in "GoodFellas"
9. "This is pitiful. A thousand people freezing their butts off waiting to worship a rat." - Bill Murray as Phil Connors in "Groundhog Day"
10. "Rats!" - Charlie Brown