jam session

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jam session

1. slang An informal or impromptu gathering of musicians in which they play unrehearsed or improvised music together. I love this bar. A lot of talented musicians hang out here having jam sessions nearly every night of the week. Let's just have a little jam session and see if we've got the chemistry to make a record!
2. slang By extension, an informal or impromptu discussion or debate. The boss said he wanted to have a jam session with everyone to get to the bottom of the recent production problems. Toward the end of dinner, we all just started into a really wild jam session about the nature of consciousness and reality itself.
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Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

jam session

an informal session where musicians play together. Andy and Nick had a jam session last night and kept all the neighbors awake.
See also: jam, session
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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