noun
freeloader; slacker; someone who doesn't earn their pay
Colloquial and mildly derogatory; used for a worker who is seen as lazy or unproductive, implying they are stealing their salary. Often used in workplace complaints.
あいつは本当に月給泥棒だ。毎日何もしていない。
That guy is a total freeloader. He does nothing all day.
月給泥棒と言われないように、ちゃんと働こう。
Let's work properly so we aren't called salary thieves.