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1) Talk about your ghosts = talk about the most weird phenomenon in your mind?

2) Man oh man = Oh good heavens?

Context:

King has this to say: ''Talk about your ghosts. Man oh man.'' Apparently, while hesitation and cogitation might have brought other words to bear,
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"Talk about your...." is an expression that serves to introduce an anecdote or example. It's meant as emphasis.

How was the flight?

The flight? It was horrible.. Talk about your turbulence. They couldn't even serve the drinks - the ice was jumping out of the glasses.


I guess the best way to explain it is, it's sort of a condensation of : "You want to talk about your example of turbulence; well, my story can top anything you've got to say."

"Man" is an expression of wonder or disbelief similar to "good heavens," yes. It can be used alone:

"Man, I can't believe you paid that much"

with "oh:"

"Oh man, we're in trouble now"

or as in your example, "man oh man." You can even add another if you like: "Oh, man oh man oh man. What the h*ll are we going to do now?"
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NL8881) Talk about your ghosts = talk about the most weird phenomenon in your mind?

"Ghosts" can also refer to things in one's past that one would rather forget. "Skeletons" is also used in this sense.