A warm mugglesville welcome to all you muggletoids!
The term "muggle" (according to Bing's search engine) refers to:
A person who does not possess magical abilities and is not part of the magical community, often used in the context of J.K. Rowling's "Harry Potter" series.
Informally, it can describe someone who lacks a particular skill or is regarded as inferior or
In a broader context, it can also refer to someone who is unfamiliar with or does not understand something, similar to the term "muggle-born" in the Harry Potter universe.
The term has evolved from its original meaning in jazz slang to encompass various uses in modern language.
Check out the definition in Etymology 2 of the Wiktionary