かたごし
looking over someone's shoulder
Also written 肩ごし
Noun
彼かれは肩越かたごしに振ふり返かえった。
He looked back over his shoulder.
彼かれは肩かたごしに後うしろを振ふり返かえった。
He looked backward over his shoulder.
僕ぼくは肩越かたごしに振ふり返かえってずっと見みた。
I looked over my shoulder.