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30.
Unlike "Scene" or "Emo", Base is for the more individual. The general characteristics of someone of the genre "Base" are; An unhealthy obsession with shoes, Outrageous hair/makeup, Bubbly personality, Enjoyment of computer games, Love of the arts, Enjoys the smell of hairspray in the morning, Enjoys a hot latte, Abnormal eating/drinking habits, Has/wants piercings and or tattoos, retro and outlandish clothing... MUST like Hot Chip (:
Look at that girl with the awesome freakin' hair and the purple eyeshadow! I love her shoes, OMG is she playing Super Mario Brothers?! She's SOOOO base!
by SammyMassacre & LanaDarko March 01, 2008
 
1.
First base: making out (french kissing)
Second base: feeling up under or over clothes
Third base: hand jobs and fingering
(3.5: oral sex)
Home run: sex, (including anal)
BOB: We got to 3.5 last night

Bill: 3.5, there is no base called 3.5, are you retarded

BOB: you're just mad cause you're never gonna get there
by Mickey D. May 13, 2008
 
2.
A pure and potent form of amphetamine, comes in a crystaline lump rather than a powder (although is normally cut before use).
Mmmm, that base is nice and soft, cut me a line.
by flame August 29, 2003
 
3.
A substance made up of about 60% amphetamine.
In contrast to speed, which is made up of about 5% amphetamine.

Often methamphetamine is defined as base: "a purer form of speed".
Methamphetamine is a completely different chemical, with different effects. Base is the same chemical as speed, just in much higher concentrations.
Usually has a different effect to speed, as the higher dosage doesn't just mean fuller effects, but whole new ones as well.

NB: both amphetamine and methamphetamine have absolutely NOTHING to do with 2,3 methylenedioxymethamphetamine (ecstasy), despite the uneducated and ill-informed ramblings of the DEA.
personone: Meth is just a purer form of speed.
persontwo: No, that's base you idiot. Meth is a different chemical to speed.
personone: Allow me to kiss your educated feet, master. I revere in your mighty intelligence.
by kako October 15, 2005
 
4.
Something which all is belong to Cats. The bomb has been set up, and they must take off every zig for great justice because they know what they doing.
How are you gentlemen?
by He who likes Bukkake March 14, 2005
 
5.
crack(freebase)
no i aint runnin base for estaban!
by $pazz April 06, 2003
 
6.
freebase, rock cocaine...
Yo lets lets go smoke some base....
by Greico July 27, 2003
 
7.
Morally low, shallow and low-brow
Eli: A club night added me on Facebook, that means I now have 352 friends! Fly like a G6 boys!! Do you guys wanna watch Skins later? They smoke weed in this one.

Jeremy: You are base
by MrRizlaSmoker September 07, 2011