expression
stray sheep; lost lamb; person at a loss
Literally a stray sheep or lost lamb; figuratively, a person who is lost, confused, or doesn't know what to do. Often carries a sympathetic or slightly poetic tone.
彼は会社を辞めてから迷える子羊のようだ。
Since quitting his job, he's like a lost lamb.
新入生はみんな迷える子羊みたいなものだ。
All new students are like stray sheep.