n.笨蛋；假貨；小攤販

He is a duffer at golf. 他不善于打高爾夫球。

I am always a bit of a duffer at maths. 我在數(shù)學(xué)方面總是有點(diǎn)笨。

My dad is a real old duffer with such out-dated ideas, but I love him anyway. 我老爸可真是個(gè)老笨蛋，有這么過時(shí)的想法，不過不管怎樣我都愛他。