expression, godan verb (-tsu)
stand out; be conspicuous; attract attention
Used when someone or something is easily noticed in a public setting, often with a nuance of being too noticeable or drawing unwanted attention.
彼女はその派手な服で人目に立った。
She stood out in that flashy outfit.
人目に立つ行動は避けたほうがいい。
You'd better avoid behavior that attracts attention.