noun.a light frothy mass of fine bubbles formed in or on the surface of a liquid or from a liquid: such as

noun.a frothy mass formed in salivating or sweating

noun.a stabilized froth produced chemically or mechanically and used especially in fighting oil fires

verb.to produce or form foam

• … streets … foaming with life …

verb.to froth at the mouth especially in anger; broadly: to be angry

verb.to gush out in foam