Learn how to say Mouthful correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word mouthful:
noun (plural mouthfuls)
1a quantity of food or drink that fills or can be put in the mouth:
he took a mouthful of beer
2a long or complicated word or phrase that is difficult to say:
poliomyelitis is a bit of a mouthful
give someone a mouthful
British informal talk to or shout at someone in an angry or critical way:
she gave him a mouthful—I’d never heard her speak like this before
say a mouthful
North American informal say something noteworthy.