Its like high-octane fuel for the brain. Its a vitamin.

Found in guarana (only good if you want a nice drink, if its only for the vitamin, then its overpricy) but mostly coffee of course. Supplements like No-Doz pills have actually their caffeine from coffee decaffeinator byproducts.
Chocolate contains too much calories to be acceptable as source of caffeine.

To get the RDA in caffeine if you don't like coffee drink Diet Coke/Pepsi/etc.

Useful info now. Caffeine doesn't act like coke or speed! It doesn't act on the same pathway! Actually it mainly blocks the "drowsiness-inducing molecules" a.k.a adenosine from acting. But it doesn't act of dopamine (=feel good) pathway like the other drugs.
by QuartzRox March 28, 2004
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To fein for have a strong urge for caffeine
Debra: Lets stop by starbucks coffee I am Caffeineing so hard

Lisa: But you just had coffee

Debra: Did I ask you? No now shutup and let me get my dose
by JTATslave1914 May 29, 2011
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A person who drinks a lot of coffee, probably is addicted to caffeine and hates decaf.
"What? That's your 5th cup.

You are a caffeiner, aren't you?"
by seiju December 25, 2017
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Caffeine , the most awesome invention of man, it allows you to stay awake for days at end. It have helped students finish homeworks the night before turning them in. Also it helped to create the wounderfull drinks we all love like coke and Coffie . Truly this substance is the best thing ever.
There is some Caffeine in in your coke, drink it.
by The lord of the dance. September 12, 2009
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A strong legal stimulant that is far more practical to snort in it's pure form than ingest by drinking disgusting, gut-wrenching coffee.
Snorting caffeine produces an immediate energy rush and more intense buzz than drinking it.
by Alexander DeLarge February 10, 2005
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