People often like designer clothes from brands like Armani and Chanel.

designer 是由动词 design（设计）加上后缀 -er 构成的名词，本义是"设计师"。在时尚领域，designer 常用来指"由著名设计师设计的"，designer clothes 就是指"名牌服装"或"设计师品牌服装"。