baby farm
n.— «Among many of the phrases used to describe her for her despicable crime, the 33-year-old was called a “baby farm” because she appeared to deliberately increase her brood to gain more state aid.» —“Reforms hark back to roots of the welfare state” by Laura Devlin EDP24 (Norwich, England, United Kingdom) Dec. 11, 2008. (source: Double-Tongued Dictionary)
Further reading
Susan from Virginia Beach, Virginia, shares the phrase her mother used when the kids refused to eat: It’ll grow hair on your back teeth. This supposed motivator likely blends two older traditions: a German idiom, Haare auf den Zähnen haben...
Why do speakers of the same language have different accents? A lively new book called Why We Talk Funny offers a linguist’s look at how and why accents develop. And: If you’ve “stood up” at a wedding, were you supporting the marriage or objecting to...
I’ve heard the word “baby factory” in this context but never baby farm.