The opposite of good is evil. This can include doing things that are considered to be wicked and out of normal behavior. Some of the reasons people are thought to act evil is due to ignorance, selfishness or even neglect. Laws are frequently broken by evil acts, and some people have gone as far as hurting others or committing murder as a result of evil.
The evil tattoo is symbolic of wicked thoughts or behavior and may be selected by members of a cult. It’s also symbolic of demons and the devil in most cases and may be combined with these tattoos, as well.