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rapid deceleration syndrome

(abbreviated to RDS)

Term for the effects of travelling at great speed and then hitting an immovable object... such as cuts, bruises, broken limbs, paralysis or death.

Originally military slang, but now used by other groups, for example:
Rock climbers: The effects of falling from a great height.
Cyclists: The effects of misjudging a corner and hitting a wall straight on.

Severe Rapid Deceleration Syndrome or SRDS usually refers to death.
"Is Mike out climbing today?"
"No he took a whipper yesterday, and he's at home recovering from a case of rapid deceleration syndrome"

"I need the day off work to go to a friends funeral - he caught a fatal case of RDS while out biking the other day"
by Jimmy1 January 22, 2007
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Decelerando

A way of bringing music to a whole new level. Mostly only Phish does this.
They bring the ghost riff back to Bb (semitone up from original key) and then proceed to decelerando and modulate down in half steps to a resolution on the F (the 4 of C where funky bitch starts) I thought it was pretty sweet.
by 2wycked July 18, 2018
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Decelerated

Comes from the word Deceleration meaning slowing down.
(Decelerated) is used as an insult less specific to certain group of people and focused on the act or behavior of someone instead of the word "Retarded" since retarded meaning is seen as an adjective for disability which is insensitive.
You are decelerated!
What was that decelerated behavior for?
What you just did was decelerated.
by DENGOO March 31, 2022
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decelerationist

A decelerationist (decel for short) is someone who believes in the curtailment, censorship or condemnation of advances in technology or philosophy in the interest of emotional comfort. Frequently, decelerationists’ solutions involve self-regulation, self-censorship or regulation at a national government level. Not to be confused with a Luddite.

A popular decel opinion in 2023 is that AI chatbots and image generators need to be programmed to prevent offensive materials from being created, because the dissemination of those materials would hurt people’s feelings.
If person A thinks players in a multiplayer video game should be prevented by the game’s code from ganging up on Player X because Player X would feel upset about it, then person B could correctly say that A is a decelerationist.
by eacc October 12, 2023
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