fizzle out
Upper Intermediate (B2)informal
To slowly stop and disappear, usually in a disappointing way — like fireworks that don't go off.
"Their romance fizzled out after only a few months."
Hear it in context

The Moment Tucker Carlson Finally Broke
Philip DeFranco · 8:10
it would just fizzle out.

The Pat McAfee Show Live | Wednesday May 6th 2026
The Pat McAfee Show · 101:55
And it kind of did it fizzle out.

Bryson DeChambeau "Would Rather Grow YouTube Golf" Than Return To PGA Tour?!
The Pat McAfee Show · 7:59
And it kind of did a fizzle out.

Hildryn Prime Doesn't Use Expertise? | Warframe Build Refresh
Brozime · 13:16
Your projectiles just kind of like fizzle out.

I Bought A Drink Nobody Wanted (And Sold It For $2 Billion)
My First Million · 46:54
figure out real trend versus fizzle out trend?