Cut-and-dry is an idiomatic expression often used to describe a situation or decision that is straightforward and clear-cut. However, when it comes to antonyms for cut-and-dry, words like complicated, ambiguous, and indecisive come to mind. These terms signify situations that are intricate, perplexing, and not easily resolved. Furthermore, the word interesting can also serve as an antonym for cut-and-dry because it implies something that is captivating, stimulating, or surprising rather than straightforward or boring. Hence, when looking for an antonym for the expression cut-and-dry, you should go for words that denote complexity, uncertainty, and intrigue.