To cover with froth.
To spit, vent, or eject, as froth.
(of a liquid) To bubble.
To create froth in (a liquid).
(literally) To spew saliva as froth; (figuratively) to rage, vent one's anger.
foam
Thousands of African children die each day: why do the newspapers continue to discuss unnecessary showbiz froth?
Highly speculative investment.
The idle rich;
unimportant or insubstantial talk, events, or actions; drivel
To cover, or coat, with verdigris.
A blue-green patina or rust that forms on copper-containing metals.
The colour of this patina or material.