In American suburban communities, McMansion is a pejorative for a type of large, new luxury house which is judged to be oversized for the parcel or incongruous for its neighborhood. Alternatively, a McMansion can be a large, new house in a subdivision of similarly large houses, which all seem mass-produced and lacking in distinguishing characteristics, as well as appearing at odds with the traditional local architecture.
N（名词）
a large modern house considered to look mass-produced, lacking in distinguishing characteristics, and at variance with established local architecture 麦氏豪宅; 一种大型现代房屋，犹如大批量建造，缺乏个性，和当地已有建筑有区别 [INFORMAL, derogatory]