"Wow, what a brilliant idea!" he said with obvious sarcasm, clearly disagreeing with the plan.

sarcasm 是名词，指"讽刺、挖苦"，指用表面赞美或积极的话语来表达相反或批评的意思。这个词来自希腊语 sarkazein，原意是"撕咬肉"，引申为"尖刻的言辞"。