You yellow dog of a cowardly Sylvester, you.
4 seconds sound clip from the Daffy Duck's Quackbusters movie soundboard.
You can hear this line at 00:34:07.555 in the DVD version of the movie.
Quote context
[...]
- Monster!
- Why, that's just a little old canary bird fluttering in the breeze.
- You yellow dog of a cowardly Sylvester, you.
- Now, Sylvester, come on off of there.
- You ought to be declawed, you silly ninny, you.
- Okay, that's it. You're done. Fired. Pink-slipped without pay.
[...]