When a woman unexpectedly inserts a finger two knuckles deep into a man's ass during foreplay.
Lisa wanted to surprise John so she gave him an aciding while she blew him.
by XYK October 4, 2012
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An adjective used to describe any person, place, activity involving abnormal unique behavior, dress, action. The opposite of basic.

Refined.
"Did you see that girl just walk by? She looked acidic as fuck."

"No dude, Sofia is different, she's acidic."
by LostBoy January 25, 2014
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Having a Ph of less that 7.0
I tripped on acid. A bottle of muriatic acid was left on the floor and I tripped over, that is.
by DrMullet February 18, 2004
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acid-The wonderful gateway in your pocket to a world that is yours for the creating, whether it be talking frogs, stary faces on apple trees that just wont blink and you're sure that they know your name or maybe just the good old headmash that convinces you that you ARE, in fact, a carrot.
A truly marvellous man made hallucinogen that could, one day, replace calpol.
mate, MATE, MAAAATE? Shhh. hello? acid? aah. i see,
i appear to have eaten something bigger than my head.
by tommo September 3, 2005
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the gateway to transcendence and temporary enlightenment. chemical keys to the gates of heaven.
I wish my bathroom sink ran hot cold and acid.
by minghi May 6, 2003
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A term that can be used alongside a person, place or thing to describe a particular event or situation that is very similar though highly exaggerated.
"I went to see that comedy show the other night. The guy was like Jim Carrey on acid."

"That disco was like the 80s on acid."
by Tomius J. Barnard July 10, 2006
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