play dirty

(informal)

to behave dishonestly, especially by cheating in a game He loses his temper from time to time, but he never plays dirty.

Name	Pronounced	Usage
Azaria	-	Biblical
Dieuwke	DOO-kə	Frisian
Nanuq	-	Native American, Inuit
Rik	RIK	Dutch
Nichola	NIK-ə-lə	English (British)
Seosamh	SHO-sav	Irish