To stain or mar (for example with infamy or disgrace).
To entangle or run against so as to impede motion.
To make foul; to soil; to contaminate, pollute.
To defecate on, to soil with excrement.
To mark a surface with such images.
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.