As in "To Be Determined". The excess fat, chunkyness, fluffyness, or plumpness on a person's body. Typically located in the midsection area of the human body blocking the abs.
Matt: Dude, you really need to start exercising.
Ricky: Yeah, I guess it's time to start figuring out what I'm gonna do with all this TBD muscle.
by Breaston December 14, 2009
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