fizz / fiz/ • v. [intr.] (of a liquid) produce bubbles of gas and make a hissing sound: the mixture fizzed like mad. ∎ make a buzzing or crackling sound: lightning starts to crackle and fizz. ∎ fig. move with or display excitement, exuberance, or liveliness: anticipation began to fizz through his veins.• n. effervescence: the champagne had lost its fizz. ∎ inf. an effervescent drink, esp. sparkling wine: a bottle of grapefruit fizz. ∎ fig. exuberance; liveliness: she saw I had lost some of my fizz. ∎ a buzzing or crackling sound: the fizz of 300 sparklers.