Definition of smears:
(v) :
(transitive) To spread (a substance, especially one that colours or is dirty) across a surface by rubbing.
(v) :
(transitive) To cover (a surface with a layer of some substance) by rubbing.
(v) :
(transitive) To make something dirty.
(v) :
(transitive) (of a substance, etc.) To make a surface dirty by covering it.
(v) :
(transitive, derogatory) To damage someone's reputation by slandering, misrepresenting, or otherwise making false accusations about them, their statements, or their actions.
(v) :
(transitive) To cause (something) to be messy or not clear by rubbing and spreading it.