Smeg, your world and others
as you can see, the word unfair is not mentioned or hinted atblack·mail (blăk'māl')
n.
- Extortion of money or something else of value from a person by the threat of exposing a criminal act or discreditable information.
- Something of value extorted in this manner.
- Tribute formerly paid to freebooters along the Scottish border for protection from pillage.
so, if you say to him that you will grass on him unless he gives you money, then that is blackmail
a far more serious crime than theft