Flop
Gen Z SlangDefinition
Flop: a failure—something or someone that underperforms or doesn’t gain traction; also used as a verb meaning to fail.
Examples
"The hype was crazy, but the movie ended up a flop—no one was talking about it by Monday."
"We tried to make that trend happen, but it flopped so hard."
"Not gonna lie, his comeback single was a flop compared to the last one."