smear

An act that brings discredit to the person who does it.

A thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscope.

A blemish made by dirt.

Slanderous defamation.

Charge falsely or with malicious intent; attack the good name and reputation of someone.

Make a smudge on; soil by smudging.

Cover (a surface) by smearing (a substance) over it.

“smear the wall with paint”

Stain by smearing or daubing with a dirty substance.