Also found in: Dictionary.
Like this video? Subscribe to our free daily email and get a new idiom video every day!
To clean someone or something by wiping or mopping. A noun or pronoun can be used between "mop" and "down." I just need to mop down the floors before our guests arrive. She mopped the child down as best as she could after he vomited all over himself.
mop something down
to clean a surface with a mop. Please mop this floor down now. Please mop down this floor.