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Related to John Hancock: Samuel Adams
(one's) John Hancock
slang One's signature. 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.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Also, John Henry. One's signature, as in Just put your John Hancock on the dotted line. This expression alludes to John Hancock's prominent signature on the Declaration of Independence. The variant simply substitutes a common name for "Hancock." [Mid-1800s]
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.
n. one’s signature. (Refers to the signature of John Hancock, one of the signers of the Declaration of Independence.) Put your John Hancock right here, if you don’t mind.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
One’s signature. John Hancock was the first man to sign the Declaration of Independence and did so in an exceptionally large, clear hand. Indeed, he supposedly remarked, “I guess King George will be able to read that” (July 4, 1776). In the mid-nineteenth century his name was transferred to anyone’s signature.
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer