The phrase "raise hackles" means to make someone angry or irritated. Other synonyms for this phrase include "get under one's skin," "rub someone the wrong way," "put someone on edge," "make someone bristle," "irritate to the core," "aggravate," and "provoke." These expressions convey a sense of annoyance, aggravation, and offense, and are commonly used to describe situations or people that produce negative reactions. Whether it's a rude comment, a critical remark, or a questionable behavior, these phrases describe the feelings of those who feel disrespected, annoyed, or angry. When someone's hackles are raised, it is an indication that things are not going well.