A yak is a type of long-haired, shaggy bovine found in high-altitude regions of Asia. It is known for its ability to tolerate cold temperatures and is commonly domesticated for its milk, meat, and wool. The word "yak" can also figuratively refer to continuous talk or a chat.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Talk on and on. Explanations are generated by AI and may be inaccurate.