Dirty pool and Double cross

Dirty pool noun - Conduct that is unfair or unethical or unsportsmanlike.

Double cross and dirty pool are semantically related In some cases you can use "Double cross" instead a noun phrase "Dirty pool".

Double cross noun - The act or fact of violating the trust or confidence of another.

Dirty pool and double cross are semantically related in cheating topic. Sometimes you can use "Dirty pool" instead a noun phrase "Double cross", if it concerns topics such as swindle, treachery, slyness, disloyalty.