Meaning of Kung Fu

Kung Fu (功夫) means something like 'to work hard, focused and skilful'. So, whenever somebody works hard on a task, exercise or problem one can say that this person has kung fu. Also for example when you work hard in your office to solve a problem or you study extremely focused for school or university or you train hard for any sport then this means you have a lot of kung fu (in) doing so.

Wu Shu (武术) is the better expression to name Chinese boxing, which is what people mean when they say Kung Fu.

From Wikipedia, the free encyclopedia:

Kung fu or gongfu (功夫, Pinyin: gōngfu) is a well-known Chinese term often used today to refer to Chinese martial arts. Its original meaning is somewhat different, referring to one's expertise in any skill, not necessarily martial.