philippic (n.)

"a bitter invective discourse, a denunciation," 1590s, from French philippique, from Latin (orationes) Philippicæ, a translation of Greek Philippikoi (logoi), referrimg to the series of orations made in Athens by Demosthenes in 351-341 B.C.E. urging Greeks to awaken to their danger and unite to fight the rising power of Philip II of Macedon, father of Alexander the Great. The Latin phrase was used of the speeches made by Cicero against Marc Antony in 44 and 43 B.C.E.