SMEAR

noun

1. A mark made by smearing.
2. Any of various forms of distortion that make a signal harder to see or hear.
3. A Pap smear.

verb

1. To spread (a substance, especially one that colours or is dirty) across a surface by rubbing.
2. To have a substance smeared on (a surface).
3. To damage someone's reputation by slandering, misrepresenting, or otherwise making false accusations about an individual, their statements, or their actions.