驢唇馬嘴　

◎ 驢唇馬嘴 lǘchún-mǎzuǐ

[be beside the point; farfetched answer or reasoning] 比喻胡說八道

驢唇馬嘴夸我解問,十轉(zhuǎn)五轉(zhuǎn)饒你從朝。——宋· 釋道原《韶州云門文偃禪師》