The phrase "unwashed hands" refers to hands that have not been cleaned with water and soap. It is often used to describe someone who lacks cleanliness or hygiene. Full definition
Mat 15:20 «These are the things which defile the man; but to eat with unwashed hands does not defile the man.» (religion.blogs.cnn.com)
It may have stemmed from a dirty instrument used during her C - section or from unwashed hands or the contaminated gloves of a health care worker. (scientificamerican.com)
The hepatitis A virus is carried in feces and may be transmitted by unwashed hands, so it spreads easily in daycare centers and other places where children play together. (babycenter.com)