What's the difference between a bad boy & a psychopath?

If a guy wants to be seen as a nice, meek, mild & meek talking, mild & meek acting, looking type of guy
(choir boy for example) to be able to not alert people what he truly is which is a hot headed manipulative petty liquor store thieve

Would he be considered a psychopath more than a bad boy? & What makes a bad boy different?
What's the difference between a bad boy & a psychopath?
Post Opinion