skull session

American  

noun

1. a meeting for the purpose of discussion, exchange of ideas, solving problems, etc.

2. a meeting held by an athletic coach, as of football, to instruct team members in new plays or special strategy.

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Etymology

Origin of skull session

First recorded in 1935–40

Example Sentences

The impromptu skull session was a rare moment of down time during “It’s Still Rock and Roll to Me,” a two-day conference on Mr. Joel’s music and lyrics that was held here over the weekend.

From New York Times