Karram-Allah-u Wajhah (Arabic: كرم الله وجهه; English: May God exalt his face) is almost solely used to honor Ali as the only early Muslim who never knelt down to an idol following his guardian and teacher Muhammad in Jahilyah. This honorific is mostly used by some Sunnis and is acceptable to Shi'a. However, Shi'a prefer using 'Alayh-es-Salam or "Peace be upon him."
References
Karram-Allah-u Wajhahu Wikipedia(Text) CC BY-SA