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do for (someone or something)
1. To cause someone or something's collapse or ruin. After he betrayed me, I vowed to do for him and steal all of his major clients.
2. To do something for someone else. In this usage, a noun or pronoun can be used between "do" and "for." Hey Jim! What can I do for you today? It was really nice of you to do that for your sister.
3. To be acceptable or sufficient. I know our vacation is shorter than we'd hoped, but I think five days off will do for us—it's better than nothing!
4. To care for someone or something. Primarily heard in UK. My husband has decided to stay home and do for our baby while I work.
5. To treat or suit one in a certain manner. The train does for me just fine because I can't afford a car at the moment.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
do for someone
1. . to provide for someone; to take care of or serve someone. Do you expect me to stay home and do for you for the rest of my life? I can't do for all of them!
2. to suffice for someone; to be sufficient for someone. Will this amount ofsweet potatoes do for you? Yes, this will do for me fine.
3. See also done for.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
1. Bring about the death, defeat, or ruin of, as in He swore he'd do for him. This usage is often put in the passive voice (see done for). [First half of 1700s]
2. Care or provide for, take care of, as in They decided to hire a housekeeper to do for Grandmother. This usage today is more common in Britain than in America. [Early 1500s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.