The complete lack of the ability to complete tasks with the normally accepted level of completeness from an average intellect. Ineffective. Lazy, but does actually perform small tasks on occasion.
Bob, despite many years of experience, was a complete failure at finishing jobs of a high quality. Instead, he would inevitably underdo even the simplest of tasks. He left so much to be completed by others and would always be underdue as well.
The opposite of a overdoes, when you don’t have enough medication to stop all your mental illnesses from showing so you seem off to everyone else because your more sad or hyper.
Guy 1: yo why are you so hyper today?
Guy 2: I didn’t take my medication thats why
Guy 1: Oh so your having a underdoes