besmunge 

be·smunge'
verb

1. to demean, look down upon, or call into question the validity of one's views or opinions; to impugn

2. to argumentatively deny one their right to their views or opinions

"You're free to think that pineapples belong on a pizza; I disagree, but I won't besmunge your taste."

besmunge by Alexis November 19, 2004

Besmudge 

To tarnish, smear, defame.

Besmudge his good name. They told lies about his character and besmudged his good name.

Besmudge by Davogee October 6, 2013