To have sex with an absurdly obese person. See: diabetes; bestiality.
John: "Did you see Bill's new girlfriend? She's gotta be at least 500 pounds!"
Joe: "Yeah, I heard he's into diabestiality."
by nnattt August 4, 2013
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A fellow Type 1 diabetic who helps you stay on track with your diabetes-related diet, exercise, logging, health, and positive attitude."
I was gonna cheat and binge on ice cream, but my diabestie intervened.
by Maryland, USA September 13, 2023
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When You play with a man with diabetes BALLS
by SuperWeenie January 9, 2017
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