Sentence:  Before Chester could compose himself, the Bombshell leaned over and planted a ruby red smackaroo right on top of his bald spot. Chester Cranepool had had a few things hit him on top of his head before, but nothing that felt that good. Looking like a Franciscan monk with a bullseye on his <WSD>beaner</WSD>, Chester simply said, “Bless you, my child.” 
Meaning of the word marked with <WSD> tags:  Head.