rock (one) to (one's) core(redirected from rock him to his core)
rock (one) to (one's) core
To affect one very deeply or profoundly, especially in a startling or revelatory fashion. The sudden arrest of my business partner for murder has rocked me to my core, leaving me questioning everything I once knew. The dramatic ending to the film rocked him to his core.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.