The term 'YAK, YAK, YAK' is often used to describe someone who talks too much. The crossword solutions for this term are PRATE (5 letters), NATTER (6 letters), RUNON (5 letters), and TALKONESHEADOFF (15 letters). PRATE means to talk in a foolish or aimless way, NATTER means to talk idly or incessantly, runon means to talk or write at length without making sense, and talkonesheadoff means to talk so much that the other person has no chance to respond. All of these words describe someone who talks too much and can be used interchangeably with the phrase 'yak, yak, yak'.