to spread or mark (something) with a sticky, greasy, or viscous substance
to apply spread (a substance) in this way thickly over a surface
to blacken the reputation of
to stain or dirty (something) by or as if by smearing
to blacken the reputation of (somebody)
to obscure or blur (something) by or as if by smearing
to become smeared
smearer noun
smeary adj