foamed plastic, synthetic resin converted into a spongelike mass with a closed-cell or open-cell structure, either of which may be flexible or rigid, used for a variety of products including cushioning materials, air filters, furniture, toys, thermal insulation, sponges, plastic boats, panels for buildings, and even ...

1. : covered with foam : frothy. 2. : full of, consisting of, or resembling foam.

Foaming or frothing at the mouth occurs when excess saliva pools in the mouth or lungs and mixes with air. Causes include drug overdose, seizures, pulmonary edema, and rabies.

Definitions of frothy. adjective. emitting or filled with bubbles as from carbonation or fermentation. synonyms: bubbling, bubbly, effervescing, foaming, foamy, spumy effervescent. (of a liquid) giving off bubbles.