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.
「他要辞职去当宇航员？」别开玩笑了！他连坐飞机都怕。
"I found a million dollars on the street yesterday." Come off it! Who would believe that?
「我昨天在街上捡到一百万。」少来了！谁会相信这种事？
"I'm going to run a marathon tomorrow." Come off it! You can't even finish one kilometer.
「我明天要跑马拉松。」别闹了！你连一公里都跑不完。