I don't know, lieutenant. I guess it means good morning, uh, Vietnam.
5 seconds sound clip from the Good Morning, Vietnam movie soundboard.
You can hear this line at 00:12:28 in the Blu-ray version of the movie.
Quote context
[...]
- Hey, is it a little too early for being that loud? Hey, too late.
- It's 0600. What's the O stand for? Oh, my God, it's early.
- Speaking of early, how about that Cro-Magnon, Marty Dreiwitz?
- Thank you, Marty, for silky smooth sound. Make me sound like Peggy Lee.
- Good morning, Vietnam? What the heck is that supposed to mean?
- I don't know, lieutenant. I guess it means good morning, uh, Vietnam.
- And who gave anyone permission to program modern music?
- Those pilots are going, I like the music, I like the music.
[...]