Something or someone that flops; something that fails or doesn't work properly; also a fish that flops around.
Agent noun formed from 'flop' (to move suddenly and heavily downward) plus '-er' suffix, creating 'one who/that which flops.'
The '-er' suffix is English's most productive way to create agents and tools—from 'run' (runner) to 'teach' (teacher) to 'flop' (flopper)—this pattern goes back over a thousand years and still creates new words daily.
Complete word intelligence in one call. Free tier — 50 lookups/day.