The phrase "that's ticket" is an expression commonly used to convey approval or agreement. If you are looking for antonyms, words that mean the opposite, there are a few options to consider. Instead of saying "that's ticket," you might say "that's not it," "that's not the one," or "that's not what I had in mind." These phrases can be used to express disapproval or disagreement with a particular idea or suggestion. Alternatively, you could use words like "no way," "not interested," or "I don't think so" to show a more definitive rejection. Ultimately, there are many ways to express your views, and it is always a good idea to choose your words carefully to convey your meaning effectively.