约定俗成

Explanation: The name refers to things or social habits often by people determined after long-term social practice or form. 　　Usage: Joint type; as the predicate attribute, object; with compliment 　　Source: "Xunzi rectification of names" were not Guyi, some of the life, that the convention should be, different from that of the not about you. " Thesaurus:  become common practice which prevails throughout, Become common climate, Xiangyanchengxi