I think I put my little bitty foot in the wrong mouth.
2 seconds sound clip from The Ant and the Aardvark (1969) - I've Got Ants in my Plans (S1E4).
You can hear this line at 00:01:19.062 in the Blu-ray version of the episode.
Quote context
[...]
- How do you like that, I got nothing.
- Boy, an anteater can bust up a party faster than a skunk in an air-conditioner.
- Sorry to eat and run, but...
- I think I put my little bitty foot in the wrong mouth.
- I better get a little light on the subject.
- Oh, there's a sign. I wonder what it says.
- Say, this is quite a place. Look at all these funny things.
- Did you ever have heartburn? Well, I got it all over.
[...]