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brew up (something)
1. To make a beverage (often coffee or tea) by brewing. You better brew up a pot of coffee—it's going to be a long night.
2. To prepare or incite something. What are you kids whispering about back there? You better not be brewing up trouble!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
brew something up
1. Lit. to brew something, as in making coffee or tea. Can somebody brew some coffee up? Let me brew up a pot of tea, and then we'll talk.
2. Fig. to cause something to happen; to foment something. I could see that they were brewing some kind of trouble up. Don't brew up any trouble!
Fig. to build up; [for something] to begin to build and grow. (Typically said of a storm.) A bad storm is brewing up in the west. Something serious is brewing up in the western sky.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.