The Collaborative International Dictionary
Frothiest
Frothy \Froth"y\, a. [Compar. Frothier; superl. Frothiest.]
Full of foam or froth, or consisting of froth or light bubbles; spumous; foamy.
Not firm or solid; soft; unstable.
--Bacon.Of the nature of froth; light; empty; unsubstantial; as, a frothy speaker or harangue.
--Tillotson.
Wiktionary
frothiest
a. (en-superlativefrothy)