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When one partner diarrheas into the others mouth. Then they proceed to gargle the diarrhea making the Chewbacca Wookie noise. After a thorough fresh poo tainting of the mouth they spit the liquefied fecal matter in to a sink.

(Note: Best if done after eating Chinese or Mexican foods.)
Ricky said to her "Your breathe smells like straight Chewbacca Mouthwash girl!"
by RickySTEEZ December 07, 2009
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