Unflattering or embarrassing facts, or questionable activities that one wants to remain secret, but which someone else may use as blackmail.
Used other than figuratively or idiomatically: see dirty, laundry.
A clothes hamper or other container in which soiled laundry is placed.
Drawings or words drawn on a surface in a public place, usually made without authorization.
Informal inscriptions, figure drawings, etc., as opposed to official inscriptions.
To mark a surface with such images.