SELL YOURSELF SHORT
Idiomatic Meaning: When you sell yourself short, it is the belief that you’re not portraying yourself in a way that’s fair to you, based on your achievements, accomplishments, or potential; undervalue, underestimate or underappreciate the good qualities of someone, usually yourself.
Literal Meaning: Offering a reduced, in size, version of yourself for sale.
Usage: Informal and formal spoken and written American and British English. Usually used in the negative as a way to bolster someone who is depressed about themselves.
Origin: 19th Century, American English. This expression originally comes from the stock market. When you “short sell” a stock, you are betting, or investing, if you prefer, that the value of the stock will go down. Short sellers make a lot of money when the stock market collapses. Short selling stock goes all the way back to the 14th Century, but it did not take on metaphoric usage for another 500 years.
Why is this funny? In the photo we see a young girl and possibly her mother looking at themselves in a fun house mirror which distorts their appearance, especially their height, making them both look short. The little girl thinks that people will pay money to see her looking exceptionally short, while the mother tells her it’s not a good idea for her to do that. The mother indicates that she’s “selling herself short” by thinking she could make money by selling her shorter mirror image. The mother implies that the little girl is much better looking than the mirror shows.
Sample sentence: “Don’t sell yourself short: at a job interview; emphasize your skills.