Definitions
1.verbTo create froth in (a liquid)."I like to froth my coffee for ten seconds exactly."
2.verb(of a liquid) To bubble.
3.verbTo spit, vent, or eject, as froth.
4.verb(literally) To spew saliva as froth; (figuratively) to rage, vent one's anger.
5.verbTo cover with froth."A horse froths his chain."