a motor mouth

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a motor mouth

A person who talks incessantly or irrepressibly. Jake is such a motor mouth that I find it exhausting talking to him! You need to quit being such a motor mouth in the classroom!
See also: motor, mouth
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

motor-mouth

verb
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
See also: