Now, here's the good part. This particular tidbit of British slang has very impressive credentials. It is, according to the Oxford English Dictionary, a straight adoption by English speakers of the classical Greek term nous, which means mind or intellect. It was used by philosophers in the 17th century to mean...well, common sense or native intelligence. It was adopted by the hoi polloi - in other words, the rest of us, in the 18th century and has been used as a slang term for street smarts ever since.

