Froth

1. n. Light, unsubstantial matter.
2. n. The bubbles caused in fluids or liquors by fermentation or agitation; spume; foam; esp., a spume of saliva caused by disease or nervous excitement.
3. n. Any empty, senseless show of wit or eloquence; rhetoric without thought.
4. v. t. To cover with froth; as, a horse froths his chain.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.