A modest searching of Google reveals, to even the least petty pedant, that the terms has been in use for at least 10 years, qv a Coventy Evening Telegraph reference from April 1999. There's even a mention in Hansard from June 2000.
The earliest reference I could find was something about a joke in an Oakland newspaper from 1965. About why pigs iron their tails or something, it's actually stored on Ancestry.com and requires registration to access. I'm not that bothered.
