The phrase "a mood shift" is correct and usable in written English.
It can be used to describe a change in emotional state or atmosphere, often in contexts related to storytelling, psychology, or personal experiences.
Example: "After the unexpected news, there was a noticeable mood shift in the room, as everyone went from excitement to concern."
Alternatives: "an emotional change" or "a change in atmosphere".
The region feels as if it is on the cusp of a mood shift.
(Try it now. Unslouch – because you were slouching, weren't you? – and see if you notice a mood shift).
If there is a mood shift in France, too (although only traces show up in the poll scores), it is in Mr. Sarkozy's favor.
Steak 'n Shake is great!" It was something of a mood shift for Mr. Biglari, who just three weeks earlier had been defeated in one of the biggest battles of his short career.
Gifford Miller, the Council speaker, played down the notion of a mood shift within the Council, even as other members spoke of rising frustration and a more militant stance against the administration.
"We've seen a mood shift from irrational exuberance to contagious pessimism," said James W. Hughes, dean of the Edward J. Bloustein School of Planning and Public Policy at Rutgers University.
The songs don't seek drama or change; they linger within a mood, shifting briefly from minor to major chords before sinking back into sodade.
As the largest euro-zone economy, it directly influences the fortunes of the others and its recovery has generated a mood-shift abroad as well as at home.
There is a sudden mood shift, and the couple begins an argument — or, more precisely, the exchange of a series of rants — that gains in intensity as the story progresses.
He told AAP the phone call signaled a critical mood shift in Australia's response to incidents like this.
The problem will only go away if and when there is a broad mood shift in the Muslim world toward rejecting militant Islamism; when it's seen as distinctly uncool, even among the counter culturally inclined, like neo-Nazism in Europe today.
