that does it

that does it

1. I've had it; that's more than I can tolerate. OK, that does it, I'm calling the police—it's 2 AM and that party is still blasting music.
2. That is all that was remaining or required to accomplish something. There, that does it. The engine should be as good as new, now! A: "I reset the breakers. Is the power coming back on?" B: "Yep, that did it!"
See also: does, that

That does it!

 
1. Inf. That completes it!; It is now done just right! When Jane got the last piece put into the puzzle, she said, "That does it!" John (signing a paper): Well, that's the last one! That does it! Bill: I thought we'd never finish.
2. and That tears it! Inf. That's the last straw!; Enough is enough! Bill: We're still not totally pleased with your work. Bob: That does it! I quit! Sally: That tears it! I never want to see you again! Fred: I only put my arm around you!
See also: does, that

that does it

Also, that does the trick. The last requirement has been fulfilled; that accomplishes it. For example, That does it; we're ready to send in the application now, or That last screw does the trick-it's fully assembled. Grose's Dictionary of the Vulgar Tongue (1823) defines do the trick as "accomplish a robbery or other business successfully," and presumably the it in the first term stands for the trick. [Early 1800s] Also see that's that.
See also: does, that

that ˈdoes it

(informal) used to show that you will not tolerate something any longer: That does it! You’ve called me a liar once too often. I’m leaving!
See also: does, that

that does it

That accomplishes it, that completes it. This synonym of that does the trick (see do the trick) is quite a bit newer and simpler, it having been substituted for the trick. It also has more of a ring of finality than the older locution, as in “The last coat of paint is on; that does it.”
See also: does, that