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

Besmidge 

To talk ill of, or to taint thy name.

Adam calls James' mum a cantankerous whore. "How dare you besmidge her fine name" James replied.

Besmidge by KourtsJamesAdam August 13, 2013

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

Besmidgen 

Occasionally used by people trying to effortlessly drop 'besmirch' into a sentence. But failing.

I feel he was trying to besmidgen my reputation, he is a real ass-hole.

Besmidgen by Smakmala August 22, 2019