Webster's Revised Unabridged Dictionary · 1913

Froth

Froth , noun

[Old English frothe, Icelandic froea; akin to Danish fraade, Swedish fradga, Anglo-Saxon āfreoean to froth.]

1.
The bubbles caused in fluids or liquors by fermentation or agitation; spume; foam; esp., a spume of saliva caused by disease or nervous excitement.
2.
Any empty, senseless show of wit or eloquence; rhetoric without thought. — Johnson
It was a long speech, but all froth. — L'Estrange
3.
Light, unsubstantial matter. — Tusser
Collocations (2)
Froth insect (Zoology) , the cuckoo spit or frog hopper; -- called also froth spit, froth worm, and froth fly.
Froth spit , See Cuckoo spit, under Cuckoo.

Froth , transitive verb

1.
To cause to foam.
2.
To spit, vent, or eject, as froth.
He... froths treason at his mouth. — Dryden
Is your spleen frothed out, or have ye more? — Tennyson
3.
To cover with froth; as, a horse froths his chain.

Froth , intransitive verb

To throw up or out spume, foam, or bubbles; to foam; as beer froths; a horse froths.