get one's hands dirty

Inglizcha izoh

1. To get involved with the unpleasant parts of a task, such as manual labor or unethical activities. If you expect to seal up every possible source of draftiness, you'll have to get your hands dirty — there will be some kneeling and crawling involved. He doesn't get his hands dirty — that's what the henchmen and the plausible deniability are for.