look at (one) cross-eyed
To glance at one in a threatening, insolent, or contemptuous manner. Usually used hypothetically. You're on thin ice, Jim—from here on out, if you so much as look at me cross-eyed, I'll have you fired so fast it will make your head spin.
look at someone cross-eyed
Fig. to merely appear to question, threaten, or mock someone. (Often in the negative.) You had better be on your best behavior around Tony. Don't even look at him cross-eyed! If you so much as look at me cross-eyed, I will send you to your room.