foamˈy adjective

Frothy

foam glass noun

A very lightweight material made by firing crushed glass with carbon, used as a heat insulator, a construction material, and a filling in lifebelts, etc

foam plasticsor foamed plastics plural noun

Cellular plastics, soft and flexible like sponges, or rigid, with excellent heat-insulation properties

foam rubber noun

Rubber in cellular form, used chiefly in upholstery

foam at the mouth

1. To produce frothy saliva
2. To be extremely angry (informal)