–verb (used with object)
1. to soil; tarnish; discolor.
2. to detract from the honor or luster of: to besmirch someone's good name.
Professor McGonagall: The house of Godric Gryffindor has commanded the respect of the wizarding world for nearly ten centuries. I will not have you, in one night, besmirching that name by behaving like a babbling, bumbling band of baboons!
Fred: [whispering to George] Try saying that five times fast.
George: [whispering] Babbling, bumbling band of baboons.
Fred: [whispering] Babbling, bumbling band of baboons.