philippic [fɪˈlɪpɪk] n.
1.) Name for the orations of Demosthenes against Philip king of Macedon in defence of Athenian liberty; hence applied to Cicero's orations against Antony, and generally to any discourse of the nature of a bitter attack, invective, or denunciation.
2.) Used to render Greek ϕιλίππειον, "a gold coin coined by Philip of Macedon, worth £1 3s. 5d. of our money" (Liddell & Scott). Obs.
1.) Of or pertaining to any person called Philip (e.g. Sir Philip Sidney); of Philippi; of the nature of a philippic or invective.
Hence Philippicize (-saɪz) v. intr., to utter a philippic or invective; also trans., to bring or put into some condition by doing this (Oxford English Dictionary 2nd Edition).
Etymology: adaptation of Latin Philippicus, adopted from Greek ϕιλιππικός, from Φίλιππος Philip (of Macedon). Compare modern French philippique.
"After spending the first day in seeking on every side some hole to get out at, like an animal first put into a cage, they gave up their resource. Yesterday they came forward boldly, and openly combated the proposition. Mr. Harper and Mr. Pinckney pronounced bitter philippics against France, selecting such circumstances and aggravations as to give the worst picture they could present" (The Writings of Thomas Jefferson: Correspondence, Henry Augustine Washington (ed.), 1859).
Credit to Lemons Don't Make Lemonade for bringing this word to my attention. Thanks for reading!