But Costigan was no tyro in the art of dirty fighting.

Their martial-arts program seemed to be little more than practice at dirty fighting.

After lunch came dirty fighting and rifle practice.

Like any reasonably tough kid who got out of high school, Armstrong had thought he knew something about dirty fighting.

Problem is, I can teach you dirty fighting, and how to use a knife, he thought.

After years of dirty fighting, the Soviet Union withdrew.

Nina in particular proved especially adept at dirty fighting.

They had Croft, the master of dirty fighting, on their side.

Any slight guilt I may have had over the dirty fighting vanished on the instant.

For such dirty fighting back, there must be penalty.