Dirty pool and Fast one

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

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

Fast one noun - A cunning or deceitful action or device.

Dirty pool and fast one are semantically related in trick topic. Sometimes you can use "Dirty pool" instead a noun phrase "Fast one", if it concerns topics such as cheating, cheat, swindle.