'To do for' definitions:

Definition of 'To do for'

From: GCIDE

Do \Do\, v. i.
1. To act or behave in any manner; to conduct one's self. [1913 Webster]
They fear not the Lord, neither do they after . . . the law and commandment. -- 2 Kings xvii. 34. [1913 Webster]
2. To fare; to be, as regards health; as, they asked him how he did; how do you do to-day? [1913 Webster]
3. [Perh. a different word. OE. dugen, dowen, to avail, be of use, AS. dugan. See Doughty.] To succeed; to avail; to answer the purpose; to serve; as, if no better plan can be found, he will make this do. [1913 Webster]
You would do well to prefer a bill against all kings and parliaments since the Conquest; and if that won't do; challenge the crown. -- Collier. [1913 Webster]
To do by. See under By.
To do for. (a) To answer for; to serve as; to suit. (b) To put an end to; to ruin; to baffle completely; as, a goblet is done for when it is broken. [Colloq.] [1913 Webster]
Some folks are happy and easy in mind when their victim is stabbed and done for. --Thackeray.
To do withal, to help or prevent it. [Obs.] "I could not do withal." --Shak.
To do without, to get along without; to dispense with.
To have done, to have made an end or conclusion; to have finished; to be quit; to desist.
To have done with, to have completed; to be through with; to have no further concern with.
Well to do, in easy circumstances. [1913 Webster]