The Collaborative International Dictionary of English v.0.48:

fizz \fizz\ (f[i^]z), v. i. [imp. & p. p. fizzed (f[i^]zd); p.
   pr. & vb. n. fizzing.] [Cf. Icel. f[imac]sa to break wind,
   Dan. fise to foist, fizzle, OSw. fisa, G. fisten, feisten.
   Cf. Foist.]
   To make a hissing sound, such as that of a burning fuse or a
   bubbling carbonated beverage.
   [1913 Webster +PJC]

The Collaborative International Dictionary of English v.0.48:

Fizz \Fizz\, n.
   A hissing sound; as, the fizz of a fly.
   [1913 Webster] fizzing

WordNet (r) 3.0 (2006):

fizz
    n 1: an effervescent beverage (usually alcoholic)
    v 1: become bubbly or frothy or foaming; "The boiling soup was
         frothing"; "The river was foaming"; "Sparkling water" [syn:
         foam, froth, fizz, effervesce, sparkle, form
         bubbles]