1. something that fails to meet expectations; a disappointment
Usage: informal
2. a firework that makes a hissing sound

Examples

• The movie was supposed to be great, but it turned out to be a real fizzer.
• After all the hype, the new product launch was a complete fizzer.
• The party was a bit of a fizzer with only five people showing up.
• We lit the fizzer and watched it sparkle and hiss.
• The children enjoyed the colorful fizzers on New Year’s Eve.
• His ambitious business plan ended up being a fizzer.