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Sandra got up ubruptly and left a conversation with her friend with out a word. For she was an active practioner of rudism.
Rudism by Allme15 February 2, 2019
Any analogy, metaphor, etc where the person speaking/writing is attempting to use a common phrase but messes it up by either mixing multiple common phrases, or simply replaces key words in the phrase with incorrect words. The most important aspect of a ruddism is that they are not done on purpose. The person must think they said it correctly.
Examples of a ruddism:

"A bird in a hand is better than two bushes."
"You have enough to do. I don't mean to throw more worms on the fire."
"She was green with ivy."
"You can't teach a dog old tricks."
"That's just my cross to burn."
"You can lead a gift horse to water, but you can't look it in the mouth."
"Six of one. Half of the other."
ruddism by He3Times July 28, 2017

Rudimentary Peni 

80's British anarcho band fronted by madman Nick Blinko. Known for their obscurity, misanthropic viewpoints, rare performances, and distinct raw sound. The general atmosphere of their output is generally regarded as very bleak, depressing and hopeless, though they often make very prolific social statements.
Matthews explains how he came up with the name of the band: "When I was at school studying biology, we were told that in the fetal stage the clitoris is a rudimentary penis."
Rudimentary Peni by Pinche Jackie December 25, 2009

rudimentary 

"dude your shits so rudimentary"
rudimentary by Sandpape Crystoph January 21, 2016

Rudiscal 

Geez Brittany is such a rudiscal - she always eats all my food without asking.
Rudiscal by Regino Phalange May 1, 2011
Any piece of wisdom espoused by Red Forman.
Redism: "Sleep tight and don't let the bedbugs put a foot in your ass."
Redism by Bud Knisley July 29, 2008