out to lunch
思路不清晰、思考能力欠佳或不理解所发生的事情。
口语·形容走神或糊涂
英文释义
mentally or physically absent or distracted; not paying attention
例句
Don't listen to him, he's totally out to lunch today.
典故来源
20世纪美国俚语，字面是出去吃午饭，引申为心不在焉或不在状态。