Not this one again!
This word was made up by someone a few years ago. Why? Perhaps to see just how many people would be taken in. I guess he is enjoying his Internet fame.
SOMEONE had to name it 'cause it had been floating around for a couple o'millenia
Etymology
"Paraprosdokian" comes from Greek "παρά", meaning "against" and "προσδοκία", meaning "expectation". Canadian linguist and etymology author William Gordon Casselman argues that, while the word is now in wide circulation, "paraprosdokian" (or "paraprosdokia") is not a term of classical (or medieval) Greek or Latin rhetoric, but a late 20th century neologism.[2][3] However, it occurs—with the same meaning—in Greek rhetorical writers of the 1st century BCE and the 1st and 2nd centuries CE.[4][5][6][7]