mouthful

/ˈmaʊθˌfʊl/
noun
  1. The amount of food or drink that fills the mouth at one time.
    • The baby spit out a mouthful of peas.
    • He took a big mouthful of soup and burned his tongue.
    • She chewed each mouthful slowly to enjoy the flavors.
  2. A long, complicated, or difficult word or phrase to say.
    • The technical term 'pneumonoultramicroscopicsilicovolcanoconiosis' is a real mouthful.
    • She struggled to pronounce the mouthful of a dish name on the menu.
    • His full name is quite a mouthful, so everyone calls him by his nickname.
Antonyms