Speed is a generic slang for the wide variety of stimulant drugs. Mostly methamphetamine.

It can also be used to refer to an extremely strong cup of espresso or coffee or a can of energy drink
Man A: i had such a hard time waking up tofay I had to drink a can of speed to get going
Man B: too bad you don't have it in pills
by Srapples December 12, 2014
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When music is playing is synonymous for speeding. When the beats are speeding it means that the music is playing. The word does have a reference to tempo. You wouldn't say that "Love and Happiness" by Al Green is speeding. You would say it about faster tracks.
Touch the Sky was speeding on my iPod.
by dumbfoundeadfan March 26, 2011
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Generic term for any upper (“upper” being a generic term for any type of speed). Any drug that acts like an amphetamine. Archaic: Not so much a recreational drug as an occupational drug (a way to get through work so you can do some good drugs).
I could use some speed to keep from dozing off at my computer.
by Unique redundancy May 16, 2019
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When you’re running super late for an event and go 20+ miles above the speed limit and don’t give a fuck about the risk of getting pulled over.
Fuck I forgot my backpack at home now I gotta speed home and get it
by Dubiks May 10, 2019
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