Lethal Dosage. L.D. is a pharmacological term used by the medical industry to standardize the toxicity of chemicals, specifically. In huge medical books, medical scientists and doctors have a standardisation for every single thing that you can possibly have in your body.
The man was slipped arsenic, which is L.D. 100.
by Dybbuk March 08, 2005
Top Definition
Long Dick
"Do you wanna cuddle, or do you want the LD"
by My Third Leg, Knee Grows Knows March 20, 2003
1. Long Dick (Jake from 'Booty Call' www.romp.com)
2. Lock Down
3. Low Down
1. "Yo girl, you want the LD?"
2. "You can't be contacted if you're in lock down."
3. "What's the LD with this party tonight."
by Diego August 18, 2003
When you try to type :D but hit L instead of :
friend: Dude, I just found $100 on the ground
me: LD
me: :D
by lolhow September 08, 2008
abbreviation for "Lincoln-Douglas"
I rock by virtue of the fact that I got first place in LD Debate
by A equals A April 11, 2005
a learning disability or one of your dumbass friends
Marcus is a ma' fuckin ld.
by Ricky Rivers September 15, 2003
adj. learning disabled or commonly used to say learing dum dum
yooo that boy is sooo LD

yeah i know right, he was special
by The troll and the grimlin November 04, 2011
abbreviation for linkdead, where one's connection drops during gaming, used as slang in mmorpgs like Everquest
He went LD
by Pol September 10, 2003
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