Толковый словарь английского языка Oxford English Reference - dick

1. n. 1 Brit. colloq. (in certain set phrases) fellow; person (clever dick). 2 coarse sl. the penis. Usage In sense 2 usually considered a taboo word. Etymology: pet form of the name Richard 2. n. sl. a detective. Etymology: perh. abbr. 3. n. Phrases and idioms take one's dick (often foll. by that + clause) sl. swear, affirm. Etymology: abbr. of declaration