froth

froth is a Noun

Definition:

[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. Froth insect (Zoöl.), the cuckoo spit or frog hopper; -- called also froth spit, froth worm, and froth fly. -- Froth spit. See Cuckoo spit, under Cuckoo.