over someone's shoulder; looking over a shoulder
Often used adverbially as 肩越しに to describe an action done from behind someone, looking or reaching over their shoulder.
He looked back over his shoulder.
Please don't peek at the screen over my shoulder.
Standard kanji spelling.
Search-only kanji form; not a standard spelling.
Compound of 肩 (かた, 'shoulder') and 越し (ごし, 'across, over').