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1.
Adj. A word used to describe something insanely awesome and psychedelic.
That trip I had yesterday was so sickadelic I thought I was riding purple talking killer whales through the ocean.
by MichaelHurst April 22, 2009
 
2.
A word used to describe something, and possibly someone, insanely awesome and psychedelic.
That trip I had yesterday was so sickadelic. I was riding a killer whale, and it was talking to me.
by happy camper! April 22, 2009