do the dirty on

do the dirty on somebody

(British & Australian informal)

to behave unfairly or very badly towards someone, often without them knowing And then he did the dirty on her and went and had an affair with her best friend.

Common Names:

Name	Pronounced	Usage
Ottavio	-	Italian
Astle	['æsl]
Tine (2)	-	Slovene
Sanjeet	-	Indian, Hindi
Dorotea	do-ro-TE-ah (Italian, Spanish), DO-ro-te-ah (Finnish)	Italian, Spanish, Swedish, Finnish, Croatian
Arjan	AHR-yahn	Dutch