Shamefully wicked; atrocious; scandalous; flagrant; grossly criminal: as, a flagitious action or crime.Guilty of scandalous crimes; profligate; corrupt; abandoned.Marked or characterized by scandalous crimes or vices: as, a flagitious record.Synonyms Execrable, Villainous, etc. (see nefarious); heinous, shameful, infamous, shocking, vile.