one-weigh valve

Sarcastic reference to da "checks in but doesn't check out" performance of unwanted body-mass dat many folks experience, especially those with low metabolism and/or edema or other medical conditions dat hinder da efficient processing of carbs, salt, and glucose.

Many highly-advertised waistline-reducing diets may not only be ineffective, but they can really be a "one-weigh valve" for your MONEY, as well, in that you just keep spending more and more over long periods of time in an effort to drop the poundage, while never really getting all that much in the way of noticeably-positive results.