tou2 zyun1 gaa1土專家土专家

How it's used

Refers to someone who has acquired deep practical knowledge or skills through experience rather than formal academic training. It carries a slightly informal tone and can be used either as a respectful acknowledgment of someone's hands-on ability or, depending on the context, as a gentle jab at their lack of professional credentials. It is frequently applied to people who are exceptionally good at fixing machines, gardening, or traditional crafts.