Coarse clothing, food or speech in a dream, for wealthy people living in luxury, signifies the loss of their positions, the change of their circumstances and the reduction of their provisions — unless they prefer that over their good things, in which case it signifies their humility, their contentment and the soundness of their way. If they do not prefer it, it signifies God the Exalted's loathing for them. Coarse speech is aversion between those who love one another.
Dream meaning · al-Nabulsi
Coarseness (rough clothing, food or speech) خشن
Source: al-Nabulsi, Ta'tir al-Anam fi Ta'bir al-Manam, p. 107. English translation by iDreamBot. Quran verses: Quran.com, Saheeh International.