English
floptastic
Blend of flop + fantastic, equivalent to flop + -tastic.
Proto-Indo-European *bʰh₂-n-yé-ti
…
Ancient Greek φαντάζω ‘to show, make visible’
Ancient Greek φανταστικός ‘able to produce the appearance of something’
Late Latin phantasticus
Middle French fantastique
English fantastic
Today it means
adj Of an attempt or endeavor, spectacularly unsuccessful.
Language periods are conventional ranges, not dates for this word.
Etymograph / floptastic