"The process of having sold out, especially to a system or body that directly undermines the principles and values you have long adhered to."

You mean like the Labour Party did during their 13 years in power? Can you remember the 'New Dawn' of 1997 and how things subsequently turned out? Or do you prefer to close your eyes, stick your fingers in your ears and go "la, la, la, la, la!"

Remember that if you Labourites succeed in destroying the LibDems we'll end up with a full Tory government. But you'd love that, wouldn't you? Because then you could beat your breasts, be all smug and pious and there'd be lots of poor people for you to agonise over.