Sentence:  She came skipping to me just now, clapping her little hands and bleating about how very, very happy she was, dear Mrs Travers. The silly young geezer. I nearly <WSD>conked</WSD> her one with my trowel. I'd always thought her half-baked, but now I think they didn't even put her in the oven. 
Meaning of the word marked with <WSD> tags:  To hit, especially on the head.