cruddy /ˈkɹʌdi/ adjective4 •(slang) Full of crud. •(slang) Crummy, lousy, worthless.Because I didn't study for my test, I feel like I'm gonna make a pretty cruddy grade. •(slang) Annoying, irritating.Some children's cartoons sure have cruddy theme songs. •(no longer used) Coagulated.His cruell wounds with cruddy blood congeal'd. — 1590 formscruddier · cruddiest