Nope. Never heard of him.
4 seconds sound clip from the Space Jam movie soundboard.
You can hear this line at 00:13:28 in the Blu-ray version of the movie.
Quote context
[...]
- And does he hop around like this?
- Well, uh does he say, What's up, doc like this?
- Yeah!
- You know, maybe there is no intelligent life out there in the universe after all.
- Hold on there, Mr. Looney Tune.
- Hey, what do you think we are, stupid?
[...]