Speed is the magnitude part of a vector, it is a scalar quantity.
The bus going 50 mph due east, was traveling at 50 mph.
by MadPhysicsMan March 21, 2004
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distance / time

The amount of distance you travel over how long it takes, (how fast you travel)
My speed increases when im reaching orgasm.
by Bubba_The_Retard November 4, 2006
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Common name for Amphetamine.
Made with pseudoephedrine and many household items such as draincleaner, lots of manufacturer's have been killed when their 'speed lab' blows up.
"Let's snort some speed."
by Diego August 25, 2003
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Ive taken speed in a needle for 17 years,im 47,sometimes full on for months,your life will turn to shit,sometimes once a month,thats more fun,its awesome for a big hit,some porn and great sex with your lady for 12 to 24 hrs ,its a great way to have sometime out from life.With speed you need to have an outlet for the intensity and we find sex is the best.You pay a huge price for the fun,as the next few days + suck,Hey if your going to play look after your body,make up for the shit you put in it,if it suits you play, if it doesnt dont,its addiction creeps on you,if you cant exercise some control with it,leave it alone,enjoy
by mark1 December 6, 2006
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Speed also goes by the name "White Lightning" and makes you more aware and focused.

Can cause depression.. do you know what depression does to us men? guess... it can cause ED and also causes premature and retrograde ejaculation... thats only the depression.. back to the drug.

Speed also causes heart rate and blood pressure to rise, making you more active and shit like that.
Dealer: want some White Lightning man?

Buyer: Sure, I could use some ED and premature ejaculation!

Dealer: Thats a no, right?
by James Lowe February 21, 2005
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Another amazing drug to be on while having sex. Much better then being on extasy but has about the same effects. Sex is amazing, but having sex while your on speed is even more AMAZING!!!
"Dude i had sex with this chick last night and she was on speed and it was like a damn machine man... brurururur..."
by SBB May 10, 2005
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