The paint is still wet — don't touch it or it will smear.
To damage someone's reputation by slandering, misrepresenting, or otherwise making false accusations about an individual, their statements, or their actions
The opposition party attempted to smear the candidate by spreading incorrect and unverifiable rumors about their personal behavior.
a thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscope slanderous defamation make a smudge on; soil by smudging stain by smearing or daubing with a dirty substance
charge falsely or with malicious intent; attack the good name and reputation of someone; "The journalists have defamed me!" "The article in the paper sullied my reputation"
To smear someone means to spread unpleasant and untrue rumours or accusations about them in order to damage their reputation. an attempt to smear the director-general of the BBC
To spread (a substance, especially one that colours or is dirty) across a surface by rubbing