complete dunderhead 十足的蠢人
total dunderhead 彻底的笨蛋
look like a dunderhead 看起来很笨
act like a dunderhead 表现得很愚蠢
call someone a dunderhead 称某人为笨蛋
1. He felt like a dunderhead after making such a simple mistake.
他犯了这么简单的错误后觉得自己像个笨蛋。
2. Don’t be a dunderhead and forget your keys again.
别再犯傻了，又把钥匙忘了。
3. She called him a dunderhead for misunderstanding the instructions.
她因为他误解指令而叫他笨蛋。
A: I locked myself out again, what a dunderhead I am.
A：我又把自己锁在门外了，我真是个笨蛋。
B: It happens to everyone, don’t be too hard on yourself.
B：这种事谁都会发生，别太责怪自己。
1) 形容一个人愚蠢或做事不机灵
2) 带有轻微幽默或讽刺意味的骂人词
3) 用于非正式场合表达不满或调侃
1. 笨蛋；愚蠢的人（非正式用语）
e.g.
Don't be such a dunderhead.
别这么傻。
2. 行为愚蠢或判断力差的人
e.g.
He acted like a dunderhead in the meeting.
他在会议上表现得很愚蠢。
noun
1. A stupid or foolish person; someone who acts without good judgment.
Synonym: fool, idiot