Something that completely fails or flops, used especially in entertainment industry; a flop (informal, sometimes humorous).
Combination of 'flop' (from earlier sense of something flopping down) and the suffix '-eroo' or '-aroo' (playful American English suffix, appearing in kangaroo, kablam, and other informal words).
The '-eroo' suffix was enormously popular in mid-20th century American slang (razzle-dazzle, hullabaloo), but it fell out of favor—which makes terms like 'floperoo' feel charmingly retro, like listening to 1940s radio comedy.
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