what idioms to say for an unfair person?

[CommuniKate]

As others have said, it depends what kind of unfair.

Something that is kind of a scam or costs more than it's worth is

- "A rip-off"
- "They ripped me off"

I also like to use funny comparisons.

"He's as fair as _______." (and then use an extreme comparison)

- a banker at a homeless shelter.
- a 3-year old in a candy store :)
- a jury of Nazis.

[Lynxear]

When someone is getting something more than he deserve and those who work hard for it is getting less.

Said in a sarcastic tone, you might say he was "born with a silver spoon". This implies that he is wealthy through inheriting the wealth and he did not have to work for his status or wealth.

If he is in the workplace he may be called a "brownnoser" or a "yes-man". These idioms mean that he flatters a boss and agrees with everything he says whether it is right or wrong. The boss rewards this person over others.

[emsr2d2]

I don't know about Canadian English, but in British English we don't use "born with a silver spoon" without following it with "in his/her mouth". I'm not suggesting that we wouldn't know what it meant if someone used just the first five words, but it would sound unfinished.

[Lynxear]

It is perfectly fine in Canadian English whether or not the silver spoon is placed in his mouth or not... the meaning is the same.

[Tdol]

That's British aristocrats for you- it's not enough to have a silver spoon when you're born; you have to know where it goes.