A bag, jar, bottle, box, crate, plastic wrapper or what have you that is impossible to open. No matter how hard you try to open that bag of chips, jar of spaghetti sauce, bra strap, or zipper, it will not open. The second you hand it off to someone else, it's open faster than your chest cavity at your own autopsy, making you feel like an idiot (and a weakling idiot at that).