Rogue (noun)

1. A dishonest or unprincipled man.
2. A man who behaves badly or irresponsibly, especially one who is fond of gambling or drinking.
3. A person who is not honest or trustworthy.
4. An animal that is not domesticated or is wild.

Origin:

Rogue is derived from the old french word "rogue" meaning "vagabond, dishonest perso.n"

Examples:

1. The rogue trader was caught embezzling money.
2. He was considered a rogue and a scoundrel by his peers.
3. The rogue elephant was shot after it killed several people.
4. The rogue software caused the entire system to crash.
5. The rogue employee was fired for stealing from the company.