He's a mere 'amateur' when it comes to cooking. [=he doesn't know how to cook well]
She played soccer as an 'amateur' before turning professional.
These photos were taken by both 'amateurs' and professionals.
(..) You never see those marks on a sober man's phone, never see a drunk's without them. There you go, you were right. I was right? Right about what? The police don't consult amateurs. That...was amazing. - Do you think so? - Of course it was. It was extraordinary, quite extraordinary. (..)2010 TvShow: Sherlock Title: A Study in Pink Season: 1 Episode 1
(..) What does that mean? It means when the police are out of their depth, which is always, - they consult me. - The police don't consult amateurs. When I met you for the first time yesterday, I said Afghanistan or Iraq. - You looked surprised. - Yes, how did you know? I didn't know, I saw. (..)2010 TvShow: Sherlock Title: A Study in Pink Season: 1 Episode 1