hang out one's shingle

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hang out (one's) shingle

To start a business of some kind. I'd be glad to take on your case—after years at that law firm, I'm finally hanging out my shingle.
See also: hang, out, shingle

hang out one's shingle

Open an office, especially a professional practice, as in Bill's renting that office and hanging out his shingle next month. This American colloquialism dates from the first half of the 1800s, when at first lawyers, and later also doctors and business concerns, used shingles for signboards.
See also: hang, out, shingle