Dictionary.com gives two definitions of “feckless”:
ineffective; incompetent; futile: feckless attempts to repair the plumbing.
having no sense of responsibility; indifferent; lazy.
I’m more interested in the second definition, because I like CALLING someone feckless, especially to their face. It’s an insult! It’s like calling someone a child, except using a word a feckless person wouldn’t [...]