Severe Rapid Deceleration Syndrome
The most extreme form of RDS
From military slang.
Death by caused by hitting an immovable object whilst travelling at great speed.
Falling from a sixth floor balcony is a good way to get a case of SRDS.
"Sadly, Steve didn't see the corner coming and hit a brick wall at 120mph."
"Was he injured?"
"Yes, he suffered from SRDS."
"Did he go to hospital?"
"No, the morgue."