Как по Английски будет juego sucio

adjective

Not based on or behaving according to the principles of equality and justice.

Примеры использования:

At times like these the legal system appears inhuman and unfair

noun

Unfair play in a game or sport.

Примеры использования:

The referee sent off two players for foul play

idiom

Mischievous or dishonest behavior

noun

Mischievous or deceitful behaviour.

Примеры использования:

She wasn't going to have any monkey business where the reputation of her only daughter was concerned