Top definition
Tripping on acid/shrooms, or any hallucinatory drug; so much so that you experience a cartoonish, alternate reality.

A reference to the Cartoon Network show "Adventure Time."
Person 1: "Hey man, I just bought some LSD."
Person 2: "Sick, wanna go adventure timing?"
Person 1: "Yeah, I'm ready to see Lady Rainicorn in person. What time is it?"
Persons 1 and 2: "Adventure time!"
by DJ GeoSpec February 18, 2011
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