Diplomatists never do know anything official, do they, Duffer dear?

My dear sir, perhaps you don't know that my nickname since the age of five has been 'Duffer?'

But Duffer dear, honestly and truly it isn't for myself I'm afraid.

What do you think of me, Duffer—and after all the proofs we've just had of the dangerous creature I am?

Lend a hand, Duffer, and we'll give him to the Nubians the girls have brought.

Yorke would get hoisted over me, and I should be laughed at for a duffer.

There is no false modesty in the confidence with which I esteem myself a duffer, at fishing.

I ain't held it all these years to let it go now fer a duffer like him.

"That duffer Waldstricker's come along with me," she told her in a low tone.

I'm such a duffer at explaining, or I'd have told you last night.