Fizz (verb)

1. To make a hissing or bubbling sound, as of a carbonated drink.
2. To become less active or lively.

Origin:

The origin of this word is uncertain, first recorded in the early 18th century and it is probably imitative of the sound made by carbonated liquids.

Examples:

1. The soda fizzed in the glass.
2. The party fizzed out after an hour.
3. The enthusiasm for the project fizzed as the deadline approached.
4. The stock market fizzed in the last quarter.
5. The champagne fizzed as it was poured into the glasses.