Definition & Meaning of "yampy"in English

What is the origin of the term "yampy" and how is it used?

"Yampy" is a slang adjective meaning silly, daft, or a bit crazy. It appears in British English in the late 20th century, likely as a playful or humorous formation without a clear etymology, possibly influenced by informal, whimsical word patterns. The term is used in informal, teasing, or affectionate contexts to describe someone acting foolishly or eccentrically. It is generally neutral to mildly playful, not offensive, and mostly used in friendly or humorous speech.