劣迹斑斑

劣跡斑斑
lièjìbānbān
notorious for one's misdeeds

CEDICT

to have committed numerous misdeeds

Wiktionary

Entry Composition

1 劣迹 lièjì
  1. bad record (esp. of a public official)
  2. unsavory track record
2 斑斑 bānbān full of stains or spots