Definitions

1. comparative adjective

Having or forming more foam or bubbles, or being more bubbly or frothy.

“The spumier the drink, the more enjoyable it is.”

2. superlative adjective

Having or forming the most foam or bubbles, or being the most bubbly or frothy.

“This spumier version of the recipe is definitely a winner.”

3. noun

One that is spumier.

“He is the spumier of all the bartenders here.”