The term 'DON'T DO THAT!' can be expressed in a variety of ways, as seen in the crossword solutions provided. The first solution is 'IXNAY, ' which is a phonetic spelling of the phrase 'ignore it' and has five letters. The second solution is 'NONO, ' which is a shortened version of the phrase 'no no' and has four letters. The third solution is 'SLAP, ' which is an acronym for 'STOP, look, and pray' and also has four letters. The fourth solution is 'STOPIT, ' which is a combination of the words 'STOP' and 'it' and has six letters. All of these solutions are ways to express the sentiment of not doing something, and they all have different lengths and meanings.