Top Definition
To be freaking out in a big way, weather high on psychedelics, or not.
George was definately "Phatty Trippin", after eating that second handful of "boomers". Or, my girlfriend started "Phatty Trippin" after she saw me speaking with that other woman. Also, the show was "Phatty Trippin", last night.
by J.Mattson May 17, 2008
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