The term 'whistle blower, in brief' is often abbreviated as 'REF', which stands for 'revealer of fraud or evil'. A whistle blower is someone who exposes illegal, unethical, or fraudulent activities within an organization. They are typically employees of the organization and have knowledge of the wrongdoing. Whistle blowers often face retaliation from their employers, so they must be brave and willing to take risks in order to protect the public interest.