A DBL body is a double body, AKA a plus-sized body and the opposite of a gym body. DBL bodies may have features as: belly fat, chubbier cheeks and many more although it varies between people. This is used to shorten the term for plus-sized people; this can also be used to be nicer describing somebody.
Boy 1: Oh yeah dude, the new girl at school got a DBL body, it’s mad fine!
Boy2: Nah bro, my types more of a gym body.