noun
profitable job; way to make money
Refers to a job, side business, or opportunity that brings in money, often with a nuance of being a good source of income or a quick way to earn.
彼はいい儲け口を見つけた。
He found a good way to make money.
この仕事はなかなかの儲け口だ。
This job is quite a profitable one.
Compound of 儲け (profit, earnings) and 口 (opening, opportunity). The exact historical derivation is uncertain, but the combination naturally yields the meaning 'a profitable opening or job'.