The term 'RATA' is a four-letter crossword solution for the phrase '___-TAT-TAT'. This phrase is often used to describe a sound, such as the sound of a machine gun or a drumbeat. It is also used to describe a type of speech pattern, where one person speaks quickly and another responds in a similar manner. In this context, it can be used to describe a conversation that is fast-paced and full of back-and-forth exchanges.