London Car Dealer speak: A small profit. A 'drink' is a profit, but a cup of tea isn't a real drink, like a beer, hence the profit is small.
I knocked out that Ford KA yesterday for a monkey.
Well done, that was a right sticker. Did you do alright?
Not really, I only got a cup of tea out of it, but it was wrapped round me for ages, so I was pleased to see the back of it.