muff

n. 笨拙的人
v. 弄糟

That muff broke all of my dishes.

那个笨蛋打碎了我所有的盘子。

I had a chance to impress her with my efficiency and I muffed it up.

我本来有机会使她了解我的办事效率，但是我错过了这个机会。