Derives from when Chelsea bought Fernando Torres from Liverpool for £50,000,000 in 2011.
So you bought a Ford KA at an auction and it's falling to bits the minute you take it round the block? Mate, you've been sold a tranny, as they say everywhere.
So you bought a world-class centre-forward and it turns out he couldn't hit a cow's arse with a banjo? I'm afraid you've been sold a tranny, no argument!