To fizz is to froth or bubble over. If you shake up a soda, it will fizz out of the bottle when you open it.

When something fizzes, you hear a hissing sound as the tiny gas bubbles are released. Any carbonated beverage will fizz when it's opened or poured, the way seltzer fizzes in a glass, or beer fizzes and foams in a mug. The word fizz, which has been in use since the 1600s, is imitative — in other words, it sounds just like what it means.

Definitions of fizz
  1. verb
    become bubbly or frothy or foaming
    synonyms: effervesce, foam, form bubbles, froth, sparkle
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    form a lather
    foam as if boiling
    type of:
    form, produce, or emit bubbles
  2. noun
    an effervescent beverage (usually alcoholic)
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    type of:
    beverage, drink, drinkable, potable
    any liquid suitable for drinking
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