Meaning: Damage the reputation of (someone or something) in the opinion of others. Make (something) dirty or discolored.
Synonyms: Sully, tarnish, blacken, drag through the mud/mire, stain, taint, smear, disgrace, dishonor, bring discredit to, damage, debase, ruin.
In Hindi: कीचड़ उछालना, मैला करना.
Use: After being kicked out of the country club, Michael did everything within his power to besmirch the name of the establishment.