客气话 refers to polite, courteous remarks that are often expected in social situations, especially in Chinese culture where 客气 (politeness/being reserved) is a key value. These phrases may be formulaic and sometimes not fully sincere — they are part of social etiquette rather than deep personal expression. You'll hear them when people compliment each other, decline offers politely, or exchange pleasantries. The term carries a slight awareness that the words are conventional, not necessarily heartfelt.