mouthful

Concise Oxford English Dictionary © 2008 Oxford University Press:
mouthful/ˈmaʊθfʊl/

▶noun (pl. mouthfuls)

• 1 a quantity of food or drink that fills or can be put in the mouth.

• 2 a long or complicated word or phrase.

– phrases
give someone a mouthful Brit. informal talk to someone in an angry or abusive way.