What is Frother?

Frother definition and meaning on Dictionary terms:
an aggregation of bubbles, as on an agitated liquid or at the mouth of a hard-driven horse; foam; spume.
a foam of saliva or fluid resulting from disease.
something unsubstantial, trivial, or evanescent: The play was a charming bit of froth.

verb (used with object)
to cover with froth: giant waves frothing the sand.
to cause to foam: to froth egg whites with a whisk.

to emit like froth: a demagogue frothing his hate.

verb (used without object)
to give out froth; foam: frothing at the mouth.