silent second
n.—Gloss: Someone who loans money to someone else in order to buy a home, usually to make them look like a good risk, without notifying the prime lender. «The holdback could be considered what is known as a silent second, which is illegal. Many private lenders have gone to jail in the past because they lent money to a homebuyer to assist in the purchase but did not advise the prime lender of this fact.» —“Owners have options in lease-to-own deals” by Benny L. Kass Richmond Times-Dispatch (Virginia) Mar. 8, 2009. (source: Double-Tongued Dictionary)
Further reading
In the thriller Down Cemetery Road starring Emma Thompson, a character uses the Briticism safe as houses, meaning “quite safe,” an expression thought to derive either from the sturdiness of a house or the sense of real estate as a secure investment...
Martita in San Antonio, Texas, is curious about the expression cool beans! meaning “that’s great!,” or “excellent.” This phrase was commonly used in the 1980s, and although the TV show Full House may have helped...