Oh, Darn! is an expression of disappointment or frustration. It is often used when something has gone wrong or when someone has made a mistake. The crossword solutions for this term are DRAT (4 letters), FUDGE (5 letters), CRUD (4 letters), and ROT (3 letters). DRAT is an exclamation of annoyance or frustration, while FUDGE is a mild expletive. CRUD is a slang term for dirt or filth, and ROT is a verb meaning to decay or decompose.