noun, noun or participle which takes 'suru', transitive verb
glancing look; quick glimpse
Colloquial noun/suru-verb for a brief, often furtive glance. Used when someone sneaks a peek or looks quickly without staring.
隣の人のスマホをチラ見した。
I took a quick glance at the person next to me's smartphone.
彼女がこっちをチラ見
She's sneaking glances over here.