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a disease or ailment where someone uncontrollably masturbates with an electric (or oscillating) toothbrush.
Ryan: "Dude, that chick has got some serious Gingivagitis goin' on."

Nick: "That's fuckin' HOT, man! I wonder if she'll let me smell her toothbrush?"

Ryan: "Don't try it, man, she also lobsterbates."
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