A limited slip differential. Normally cars have an open differential or "peg leg" which allows the outside wheel to turn more when cornering. The downside of this is the car loses traction easily due to all of the power being transferred to the wheel with the least grip, causing a one wheel spin.

A LSD limits the slip of the wheel using clutches which lock the two wheels together when it reaches enough slippage.

This allows for increased traction and speed in drag races, increased control in drifting and increased handling in grip racing.

Known as posi-trac to muscle car guys.

Is not a "locker" which locks the rear wheels together temporarily for drag racing only.
"I just installed an LSD on my 240sx to make my drifting smoother"

"My Mustang has an LSD to make it launch with less wheelspin."

"My Porsche came from the factory with an LSD, this makes me able to accelerate out of turns easier."

"OS Giken makes some high quality LSDs"
by Drift_ghost September 04, 2011
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Long Slow Distance is just one of the runs needed in the training program for someone intending to run marathons; speed, strength and hills are also important. So if you hear a runner say they have to go to bed early because they are doing LSD in the morning do not call a rehab center.

L S Ds and Speed are for runners!
L S Ds are part of any serious runners training program; Thursdays are my LSD runs.
by Denise Schmigelski October 20, 2006
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The best way to describe it is that it is the dying hallucination, it's the last shit you see while your dying. Nothing will ever enlighten you more than 500 micrograms of acid. EVER!

except for maybe 1000 micrograms or ten hits. That's like a three day trip and nobody want's to trip for three days, that's just wild. Also, much of the acid you find today is 95% pure, the rest is adulterated mdma and nicotine, scopolamine, and atropine, etc. This is why acid has gotten weaker over the years and a hit that used to cost $5 in 1987 is now $15 in 2010. True Story.
LSD is the most powerful substance on the face of the planet. It is an experience, not a drug!
by TourScribes01 November 09, 2010
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I gotta take a long,slow dump!
Oh man I'm really feelin that LSD now!
by Oprah March 13, 2005
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Common nickname of Denny's on Lake Street in Hanover Park, IL.
Dude, meet me at LSD.
by kisstin July 20, 2009
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