Definitions of Sully:

• noun:   French statesman (1560-1641)
• noun:   United States painter (born in England) of portraits and historical scenes (1783-1872)
• verb:   place under suspicion or cast doubt upon

  Example: "Sully someone's reputation"

• verb:   make dirty or spotty, as by exposure to air; also used metaphorically
• verb:   charge falsely or with malicious intent; attack the good name and reputation of someone
• name:  A surname (very rare: popularity rank in the U.S.: #67400)