Individual or entity with the prior history of being intellectually dishonest, or who has already revealed themselves as lacking objectivity but is operating under false pretenses.

A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.

A person that attempts to lie, cheat, or decieve, in a poor manner.Can be used positively or negatively.

A bad Actor: Steven Segal

Criminal , ill-tempered
relate to (idiomatic-law)