live by one's wits

live by one's wits idiom
Manage by clever expedience rather than hard work or wealth. For example, Alan's never held a steady job but manages to live by his wits. This expression uses wits in the sense of “keen mental faculties.” [c. 1600]

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.

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