BILLINGSGATE, N. The Invective Of An Opponent. -- Ambrose Bierce, "The Devil's Dictionary

Related:

• HARANGUE, n. A speech by an opponent, who is known as an harrangue- outang.
  -- Ambrose Bierce, "The Devil's Dictionary...
• ACCORD, n. Harmony. -- Ambrose Bierce, "The Devil's Dictionary
• IMPUNITY, n. Wealth. -- Ambrose Bierce, "The Devil's Dictionary
• TRUCE, n. Friendship. -- Ambrose Bierce, "The Devil's Dictionary
• PITIFUL, adj. The state of an enemy of opponent after an imaginary encounter with oneself.
  -- Ambrose Bierce, "The Devil's Dictionary...
• Brain, v. [as in "to brain"]: To rebuke bluntly, but not pointedly
  o dispel a source of error in an opponent. -- Ambrose Bierce, "The Devil's Dictionary...
• brain, v: [as in "to brain"] To rebuke bluntly, but not pointedly
  o dispel a source of error in an opponent. -- Ambrose Bierce, "The Devil's Dictionary...