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!