It was a little old cricket bug.
3 seconds sound clip from the The Aristocats (1970) movie soundboard.
You can hear this line at 00:50:36 in the Blu-ray version of the movie.
Quote context
[...]
- Let's see. They're Oxford shoes. Size nine and a half. Hole in the left sole, it sounds like.
- They're black... Now, how would I know that?
- Hey! Now the squeaking has stopped.
- I still say it was a little old cricket bug.
- I'm the leader. I'll decide what it was.
- It was a little old cricket bug.
- I'll see ya in the morning, Napoleon.
- That's my hat. I'm the leader.
- Well, shoot fire. Don't get sore at me. I ain't done nothin'.
[...]