as thick as thieves meaning in English

亲密无间
中者

So the king sneaked into the wigwam and took to his bottle for comfort , and before long the duke tackled his bottle ; and so in about a half an hour they was as thick as thieves again , and the tighter they got the lovinger they got , and went off a - snoring in each other s arms
没多久，公爵也抓起了他的酒瓶。这样，半个钟头以后，两人又亲热得什么似的。并且越是醉得厉害，也就越是亲热，最后抱在一起大打起呼噜来。