got one's hands dirty

Verb

get one's hands dirty (third-person singular simple present gets one's hands dirty, present participle getting one's hands dirty, simple past got one's hands dirty, past participle (UK) got one's hands dirty or (US) gotten one's hands dirty)

1. (idiomatic) 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.