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'T-Rex Arm' :

When laying in bed cuddling your partner, and one arm gets trapped under both bodies/pillow rendering it useless, it is 'T-Rex Arm', i.e completely void of movement and use.Thus, similar to a Tyrannosaurus rex's arm.
Girl- Hey Todd, pass me the remote

Boy- I Can't i've got T-Rex Arm!
T-Rex Arm by P-Master-T June 1, 2009
This is the result of ataxic cerebral palsy. A person with this birth defect has one or two small and withered arm resembling the arm of a tyrannosaurus rex.
Wow did you see the t-rex arm on that chick????
t-rex arm by lowtarsmokenfool July 3, 2010
A symptom after getting the Covid Vaccine.
I got my covid vaccine yesterday and I cant lift my arm high. Totally have T-Rex arm
T-Rex Arm by Killrek May 11, 2021

Baby T-Rex Arm 

Arm cramp that men may get as a result of spooning, when they can't figure out what to do with their other arm and its gets squished up next to their body
Jim had to deal with a baby T-Rex arm at work after spooning his wife all night without moving.
Baby T-Rex Arm by Ninjetturtle June 29, 2014

T. rex arm 

Kid with a fucked up arm to where it’s like a T. rex arm.
Look at that retard with the fucked up arm nigga got a T. rex arm!
T. rex arm by L. Oh L. October 7, 2022

T-Rex Arms 

After working out your biceps the following day your arms become sore and unbendable causing this condition. Also referred to as "Dino Arms".
I'm having major issues getting my shirt on this morning. I have a bad case of t-rex arms after that crazy workout.
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The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
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