smack up(redirected from smacks up)
To beat someone physically, especially without causing severe or lasting injury. A noun or pronoun can be used between "smack" and "up." I knew some kids in school whose parents smacked them up at home for being disobedient. Take a couple of men with you and go smack up that witness. Teach him why it's a bad idea to testify against me next week.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.