do the unthinkable(redirected from did the unthinkable)
do the unthinkable
To do something that would never be expected to be done, especially something particularly unorthodox or extreme. Lena was a stellar student until she did the unthinkable and dropped out of school. If they have any chance of winning this game, they're going to have to do the unthinkable and pull their star quarterback.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.