独霸一方

獨霸一方
dúbàyīfāng
  1. to exercise sole hegemony (idiom); to dominate a whole area (market, resources etc)
  2. to hold as one's personal fiefdom

CEDICT

在某地或某方面称霸，无人可敌。多含有贬责之意。

重編國語辭典

Entry Composition

1 独霸 dúbà
  1. to dominate (a market etc)
  2. to monopolize
2 一方 yīfāng
  1. a party (in a contract or legal case)
  2. one side
  3. area
  4. region