mom-and-pop

1. Of or being a small business that is typically owned and run by members of a family: a mom-and-pop grocery store.
2. Resembling or evocative of the small-scale, homelike, or informal atmosphere of such a business: "toasted the advantages of mom-and-pop journalism" (Newsweek).

An adjective denoting a small-scale and family-like atmosphere, often used to describe these types of businesses and investors.

Investopedia Says:
A mom-and-pop business is typically a small family-run business. A mom-and-pop investor is typically a regular investor who doesn't invest for a living.

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