Put Your John Hancock Here!

Do you know the meaning “Put your John Hancock here?” John Hancock was president of the Second Continental Congress. He signed the Declaration of Independence on July 4, 1776. His signature was the largest on the Declaration of Independence.

Today, some people say put your "John Hancock" here, which means put your signature here. Therefore, if you hear someone say put your "John Hancock", you now know what it means. :)