Yeah. Shit, I can't think of it.
4 seconds sound clip from the Good Morning, Vietnam movie soundboard.
You can hear this line at 01:23:38 in the Blu-ray version of the movie.
Quote context
[...]
- Let's play a little game show while we're waiting.
- Who can tell me who sang the song My Guy?
- Boston.
- Boston. You know who sang the song My Guy?
- Yeah. Shit, I can't think of it.
- Yeah, shit, I can't think of it. That's right.
- You don't win the case of fish balls and lizard testicles. Thank you for playing anyway.
[...]