1DF an amount of food or drink that you put into your mouth at one time :
Michael told his story between mouthfuls.
Michael told his story between mouthfuls.2 a long word or phrase that is difficult to say :
Her real name is a bit of a mouthful, so we just call her Dee.
(a bit of) a mouthful
informal
Her real name is a bit of a mouthful, so we just call her Dee.3 to speak angrily to someone, often swearing at them
give somebody a mouthful
informal especially British English4 to say a lot of true and important things about something in a few words

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