mouth off
Definition of mouth off
informal
: to talk in a loud, unpleasant, or rude way He got in trouble again for mouthing off to his teacher. She's always mouthing off about how much better she could run the company herself.
From the M-W Editors
Word by Word Definitions
: the natural opening through which food passes into the body of an animal and which in vertebrates is typically bounded externally by the lips and internally by the pharynx and encloses the tongue, gums, and teeth
: grimace
: an individual requiring food
: speak, pronounce
: to utter bombastically : declaim
: to repeat without comprehension or sincerity
: from a place or position
: away from land
: at a distance in space or time
: used as a function word to indicate physical separation or distance from a position of rest, attachment, or union
: to seaward of
: from the possession or charge of
: seaward
: right
: more removed or distant
: to go away : depart
: kill, murder
: office; officer; official
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