near the knuckle

The phrase "near the knuckle" is an idiomatic expression that means something is controversial, offensive, or edgy, often with regards to humor or conversation. It suggests that the subject matter or language used may be provocative, crossing the boundaries of acceptability or good taste. The expression often implies a sense of risqué or close-to-the-mark content that may offend or shock some people, while others may find it amusing or engaging.