muggle
/ˈmʌgl/noun
- informal a person who is not conversant with a particular activity or skill〈非正式〉门外汉; 外行：
she's a muggle: no IT background, understanding, or aptitude at all.
她是个外行：对信息技术一无所知, 完全没有理解力或是天分。
词源
1990s: used in the Harry Potter books by J. K. Rowling to mean'a person without magical powers'.