Making temporary note of something in your cranium
Dave: "What was the name of the girl you took home last night?"

JimmyGumJobs: "Don't know, only wrote her name down in mental pencil, won't see her again."
by gymsmyth June 1, 2010
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A description for a person or group of people who cannot form opinions from their own perspective and instead have others such as corporations/institutions indoctrinate them on how to think and feel, comparable to being a slave.
"Anyone who trusts any mainstream news outlet is mentally whipped"
by Badman369 January 24, 2021
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One of the forms of terrorism used by the smart asses in the everyday office environment (in the form of following up on issues with coworkers who hoped that the particular issue has fallen between chairs).
"Aww crap John just mentally waterboarded us on the missing schedules discussed two months ago."

"Yes I hate this mental waterboarding!"
by captainjayjay June 25, 2020
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What I call myself.
Person 1: I think murder’s okay 🤪🤪🤪🤪 /j
Person 2: You mental patient
by Superjuliam October 15, 2021
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Not to be confused with "Fluid Mental Rigidity". Although similar, the difference is between the ability to stand one's ground but also be accepting of others and there difference's. Someone with this trait can fit in anywhere or be any shape the situation requires, without conflict of ideology or lifestyle. Like a fluid.
Man! I thought that preppy kid wouldn't be able to handle that kind of crowd! I was wrong, he must have a fluid mentality.
by Bmanb May 15, 2023
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