Do For Meaning

(transitive, Britain) to doom; to bring about the demise of

Example: Used other than as an idiom: see do,‎ for.
  Smoking did for him in the end.
  She's done for!
1918, Siegfried Sassoon, The General
  "He's a cheery old card," muttered Harry to Jack
  As they slogged up to Arras with rifle and pack.
  . . .
  But he did for them both by his plan of attack.
1922, James Joyce, Ulysses,chapter 16
  --That bitch, that English whore, did for him, the shebeen proprietor commented. She put the first nail in his coffin.