Frothy (adjective)

1. Full of or producing foam.
2. Light and airy; insubstantial.

Origin:

Middle english: from old english frothig. .

Examples:

1. The beer was frothy.
2. The sea was frothy with whitecaps.
3. The frothy mixture was beaten until stiff peaks formed.
4. The frothy drink was topped with whipped cream.
5. The frothy speech was filled with empty promises.