Sentence examples for a punk from inspiring English sources

The phrase "a punk" is correct and usable in written English.
It can be used to refer to someone who is part of a subculture associated with punk music and fashion, or it can be used informally to describe someone as rebellious or disrespectful.
Example: "He always dresses in leather and spikes; he's definitely a punk at heart."
Alternatives: "a rebel" or "a misfit".