Definitions

1. verb

to cover or smear with a layer of something, especially a foul or disgusting substance.

“The rotten food had besmirched the once pristine white surface.”

2. verb (archaic or poetic)

to smear or besmear with a foul substance.

“The wicked villain sought to bescurf the good knight’s armor.”

3. noun

a foul or disgusting substance.

“The bescurf on the wall was a sign of neglect.”