Rig juice is a "regular" smoothie with rigby's piss and shit in it and every drug known to man in it.
Rigby: Hey Mordecai, wanna try my new drink, it gonna make us famous, i call it rig juice.
Mordecai: dafuq you put in that thing?
Rigby: ( ͡° ͜ʖ ͡°)
by kiounou May 16, 2022
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