If that is so then I am a warthog's uncle!
6 seconds sound clip from the Wizards (1977) movie soundboard.
You can hear this line at 01:04:37.924 in the Blu-ray version of the movie.
Quote context
[...]
- Look, look. Real, beautiful presents.
- Now, that is a wonderful trick. Wonderful.
- It's Avatar. Oh, General. It's him. It's bad. It's come to hurt the fuhrer.
- Kill it. Oh, master, kill it.
- That's impossible. That dirty old man is Avatar the Great?
- If that is so then I am a warthog's uncle!
- The enemy is dead. Oh, master, the enemy is dead.
- Master loves Larry. Master feeds Larry.
[...]