Hold your horses is an expression used to tell someone to wait or slow down. It is often used when someone is getting too excited or impatient about something. The two crossword solutions, WHOA and NOTYET, are both variations of this phrase. WHOA is an exclamation used to express surprise, shock, or to stop someone from doing something. NOTYET is a way of saying that something has not happened yet and that the person should wait. Both of these phrases are used to express the same sentiment as 'Hold your horses!'