The process of taking all the disgusting celery out of your soup.
Eww, dude wtf?! Don't eat your soup without deceleration FFS!
by Retto Elbaroda February 18, 2021
A term describing damage caused by slamming or smashing something.
"My cell phone dropped out of the window and died of deceleration trauma"
by DanoNYC January 18, 2010
it's a holiday made up by that vegan teacher as a result to her sanity going to the uncanny valley
that vegan teacher: it's vegan deceleration day!

person: ok and?
by rick animation February 26, 2022
(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 20, 2007
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