That's just an expression.
2 seconds sound clip from the Harvey (1950) movie soundboard.
You can hear this line at 00:37:28.330 in the Blu-ray version of the movie.
Quote context
[...]
- But this, this is much more serious.
- It stands to reason no one has ever seen a white rabbit six feet high.
- So she must be committed here temporarily. Under the circumstances, I'd commit my own grandmother.
- Does your grandmother drink, too?
- Yes.
- Well, I like you too, Doctor.
[...]