In a dream it is killing. Insulting protected non-Muslims (dhimmis) and other unbelievers signifies dictating [words] among people and hurling talk. If he insults someone whom he is obliged to obey and treat kindly, and whose kindness reaches him, it signifies disobedience to parents and turning away from God the Exalted — or [it signifies] obeying the one he insulted in the dream.
Dream meaning · al-Nabulsi
Insulting (verbal abuse) سب
Source: al-Nabulsi, Ta'tir al-Anam fi Ta'bir al-Manam, p. 176. English translation by iDreamBot. Quran verses: Quran.com, Saheeh International.