froth - definition and synonyms

noun 

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/frɒθ/
  1. 1
    [singular/uncountable] a mass of small air bubbles that form on the surface of a liquid

    The coffee had a milky froth on top.

    1. a.
      a mass of small white bubbles of saliva coming from a person’s or animal’s mouth, especially because they are ill
  2. 2
    [uncountable] something that seems pleasant or enjoyable, although it has no useful purpose or importance

    Most of the shows on TV are froth and trivia.