stupidstition

Blend of stupid +‎ superstition. First use appears c. 1919. See cite below.

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stupidstition (usually uncountable, plural stupidstitions)

1. (slang, derogatory, humorous, uncommon) A belief or superstition that is especially foolish or senseless, or lacking any rational basis.
   • 1919, Eliot Harlow Robinson, "Smiles," a Rose of the Cumberlands, page 295:

     I don't believe in that, or any other unpleasant 'stupidstition' as my reverend used to call them , " Rose retorted, as she hastily began to dress, for the last time, in the blue striped costume which had been hers for nearly three years, but was, in a few hours, to change to one pure white, like a sombre chrysalis to a radiant butterfly.

   • 1957, Truth Seeker, volumes 84-85, page 51:

     Do you really believe in religious "Bunk"? If so, please read enclosures - and "Wise Up"; it is a shame for an editor to be a Victim of Superstition. Yours for truth, yours against Christian "Stupidstition".

   • 1995 July 17, larry_watson, “More Superstitions”, in rec.sport.golf‎^[1] (Usenet):

     I bet the next person that has to hit out of that bunker really appreciates your stupidstition. Why not put them in your bag so they don't hinder other people? That would be some of my luck. Plug a ball in the bunker with one of your damn pennies setting in the way. What about it guys should we get the USGA to adopt a new rule saying you can remove one of Jeff's pennies or just mug him in the parking and make sure he doesn't make it to the first tee with pennies in his pocket.

   • 2004, Bernard M. Patten, Truth, Knowledge, Or Just Plain Bull, How To Tell The Difference : A Handbook of Practical Logic and Clear Thinking, page 137:

     Yes, that's a platitude: Superstitions by definition are unfounded and are, therefore, all nonsense. They are stupid, too. Because they are stupid, we have a right to call them stupidstitions.