What is the meaning of the word "dutch uncle"?

A "Dutch uncle" refers to a person who gives frank, harsh, or stern advice and criticism in a manner similar to that of a disciplining relative. The term is used to describe someone who is blunt and direct in their guidance or feedback, often out of a desire to help improve or correct someone's behavior, rather than to belittle or discourage them. This type of advice is typically well-intentioned and aimed at providing honest, constructive feedback, albeit delivered in a no-nonsense or uncompromising way. The origin of the term is somewhat unclear, but it contrasts with other "national uncle" terms, which often embody stereotypes or perceived national characteristics.

Definitions:

a counselor who admonishes frankly and sternly noun
- After the meeting, she thanked her mentor for being a Dutch uncle, whose straightforward critique spurred significant improvements in her project.
- He approached the situation like a Dutch uncle, offering tough love and honest advice to help his nephew overcome his challenges.