look sideways at (someone or something)
To view or regard something in a disapproving or distrustful manner. I can't understand why everyone in this club is looking sideways at me. Am I not wearing the right clothes? Some people look sideways at these institutions, but I believe they are beneficial to the public.
look sideways at
Glance at suspiciously or amorously, as in I'm sure the detective was looking sideways at me, and it made me very nervous, or They were looking sideways at each other, and I don't think it was innocent. [Mid-1800s] Also see look askance.