you can't polish a turd(redirected from you cannot polish a turd)
you can't polish a turd
proverb You can't make something unpleasant seem more appealing than it really is—attempting to do so is often a futile effort. "Turd" is a slang term for a piece of feces. Look, man, your term paper was bad before, and all of your edits are just making it worse—you can't polish a turd, you know.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.