white-shoe
adjective [ usually before noun ] US informal uk/ˈwaɪtˌʃuː/ us/ˈwaɪtˌʃuː/
属于特权（或有产）阶级的;属于上流社会的（用来形容历史悠久、很成功、传统保守的公司）
used to describe a company, etc. that has been successful for a long time and has a traditional, conservative reputation
She's a partner at a white-shoe law firm. 她是一家老派律师事务所的合伙人。