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1.
Something that appears to be as if one was on acid. Something trippy looking.
That picture is trippy looking. It is rather acidic.
by Sexy Lexie May 15, 2007
 
2.
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
 
3.
A term that is used to describe an object that is groovy,cool,awesome,psychedelic, or to describe your mood after you have taken the drug acid.


"Dude that acid was tottaly acidic!"
by The dude who mooed March 20, 2009
 
4.
If you are acidic you are sweet, smart, sexy, funny and essentially amazing. If a person is acidic, they are basically perfect in your eyes. Acidic=awwwwesome.
Mark, you are so acidic..I love you.
by Chels February 28, 2005