- But B is for boy...
- B.
- With a baseball and bat.

6 seconds sound clip from the E.T. the Extra-Terrestrial movie soundboard.

You can hear this line at 00:52:28 in the Blu-ray version of the movie.

Quote context

[...]

- Basket. Bandit. Ball. Basket. Bandit. Ball.

- Bugs. Bananas?

- Intoxicated?

- You sure you have the right Elliott?

- B. B. Biscuits.

- B.

- But B is for boy...

- B.

- With a baseball and bat.

- You said B.

- B.

- You said B. Good.

- B. Good.

[...]