would as soon do as look at you

would (just) as soon (do something) as look at (one)

Would desire or be very willing to do something harmful or malicious to one. Don't go messing with that guy, Jake—he'd as soon kill you as look at you. I really hate that braggart. I would as soon knock his block off as look at him.
See also: look, soon
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

would as soon do something as look at you

Rur. would be eager to do something harmful as simply look at you. He was a mean so-and-so who would as soon shoot you as look at you. He'd as soon pick a fight as look at you.
See also: look, soon
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also: