The term is labelled as Northern English / slang in Collins Dictionary. Lexico is not familiar with it. Also, there is an entry in Wiktionary stating that,
Inclined to know more about the term. Is this word known outside (1) North England, (2) the UK? It seems to me the Scottish variant of it is bampot. However, I'm not sure about that. Have you ever heard/seen it before? Do you agree with the above usage note made by Wiktionary?This term is often used affectionately among close friends.
Comments are welcome.