cross-eyed, adv. — Green’s Dictionary of Slang

cross-eyed adv.

used as an intensifier.

1995

G. Pelecanos Down by the River 49: [A] couple of plainclothes detectives [...] cross-eyed drunk and armed to the teeth.

look at someone cross-eyed (v.)

to look in an aggressive manner, or in what is perceived as one.

1936		T. O’Reilly Tiger of the Legion 4: If another kid as much as clenched his fist at me, I’d run like a rabbit—and so I would if a cow or goose looked at me cross-eyed.
1994		M. McAlary Good Cop Bad Cop 34: He never faked injuries or beat up prisoners who looked at him cross-eyed.