"nincompoop" in Chinese (Simplified)
蠢蛋笨蛋
Definition
“Nincompoop”指愚蠢或傻气的人，常用作轻松的玩笑或嘲讽。
Usage Notes (Chinese (Simplified))
该词幽默、略显老派，不常用，非常温和。有时用于朋友间打趣，不适合正式或严肃场合。以玩笑语气表达。
Examples
Don't be a nincompoop!
别做个**蠢蛋**！
He acted like a nincompoop at the party.
他在聚会上像个**蠢蛋**。
Only a nincompoop would forget their own birthday.
只有**蠢蛋**才会忘记自己的生日。
Come on, you nincompoop, that's not how you do it!
拜托，**笨蛋**，不是那样做的！
My little brother can be such a nincompoop sometimes.
我弟弟有时候真是个**蠢蛋**。
Stop messing around, you nincompoop!
别瞎闹了，你这**蠢蛋**！