dassit

Phrase

that's it

1. That's all (there is nothing more to the issue).
   • So, that's it? I thought there would be some more.

   Synonyms:

   is all, that's all, that's your lot

2. I have had it (an exasperated refusal to tolerate the situation further).
   • Ruwon: Has Odo ever shown any kind of... physical interest in you, Major?
     Kira: That's it! You can rip the cloaking device out of the Defiant right now, I am not answering any more questions! And I suggest you avoid asking Odo those questions... or you may just find yourself on the other side of...1993, Ethan H. Calk (story), John Shirley (teleplay), “Visionary”, in Star Trek: Deep Space Nine, season 3, episode 17, Jack Shearer and Nana Visitor (actor)

   Synonyms:

   that does it, enough is enough

3. Yes!, exactly!, bingo!
   • A bright idea came into Alice’s head. “Is that the reason so many tea-things are put out here?” she asked.
     “Yes, that’s it,” said the Hatter with a sigh: “it’s always tea-time, and we’ve no time to wash the things between whiles.”1865, Lewis Carroll, “Chapter 7”, in Alice's Adventures in Wonderland
4. Eureka! (indicating a realization or discovery of a solution)