Definition
An exclamation used to express disbelief or strong disagreement with what someone is saying; often implies impatience or annoyance.
得了吧！
"He's going to quit his job to become an astronaut?" Come off it! He's afraid of flying.
「他要辭職去當太空人？」別開玩笑了！他連搭飛機都怕。
"I found a million dollars on the street yesterday." Come off it! Who would believe that?
「我昨天在街上撿到一百萬。」少來了！誰會相信這種事？
"I'm going to run a marathon tomorrow." Come off it! You can't even finish one kilometer.
「我明天要跑馬拉松。」別鬧了！你連一公里都跑不完。