put (one's) John Hancock on(redirected from putting their John Hancocks on)
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put (one's) John Hancock on
To sign one's name on a document or other item. John Hancock, an influential figure in the American Revolution, is known for his especially large and legible signature on the Declaration of Independence. As soon as you put your John Hancock on these papers, you'll be the proud owner of a brand new car! I would never have put my John Hancock on such an unfavorable contract—I think my signature was forged.