slang Something very large, exciting, or impressive. Often used in the construction "a stonker of a (something)." Primarily heard in UK. The director is usually known for dramas, but he made one stonker of an action film! Have you heard her latest album? It's a real stonker.

slang Something very large, exciting, or impressive. Primarily heard in UK. The director is usually known for dramas, but he made one stonker of an action film! Have you ever heard her perform live? She puts on a real stonker of a concert.