Hart also stole it, but dropped the final 'z'.
"Zotz! is a 1947 novel by Walter Karig and a 1962 movie, directed by William Castle, about a man obtaining magical powers from a god of an ancient civilization.
"Amongst science fiction fandom, the word refers to a useless, unwanted gift. ... source Wikipedia
I read the book over 40 years ago. Point finger at target; say, "zotz!", and target drops dead. Still a good story; find it and read it, but ignore movie.
From my own decades in "organized" fandom, I can testify that it was usually shortened to, 'Zot!'
BTW, the Fickle Finger of Fate is pointed at you...ZOT(Z)!
I take it you missed my post #45.
Book found: http://tinyurl.com/ph8dmj
I still have the book-- read it as a teenager... re-read it a few months ago, and tarnation! Still a pretty good yarn.