Foam

“Froth is a very important feature of many types of coffee.”

Unimportant events or actions; drivel

“Thousands of African children die each day: why do the newspapers continue to discuss unnecessary showbiz froth?”

To create froth in (a liquid).

“I like to froth my coffee for ten seconds exactly.”

(of a liquid) To bubble.

To spit, vent, or eject, as froth.