The term 'It'll Never Work' can be broken down into four crossword solutions: DUD (3 letters), NOUSE (5 letters), HAREBRAINEDIDEA (15 letters), and SCRATCHTHATIDEA (15 letters). DUD is a slang term for something that is of no value or use, while NOUSE is an informal way of saying that something is not useful. HAREBRAINEDIDEA is a combination of two words, 'HAREBRAINED' and 'IDEA', which together mean an IDEA that is foolish or impractical. Finally, SCRATCHTHATIDEA is a phrase that implies that an IDEA should be abandoned or disregarded. All together, these solutions suggest that the phrase 'It'll Never Work' is used to describe an IDEA that is not practical or useful and should be discarded.