pat-a-cake是什么意思？在辞典中怎么没有查到？

这是出自一首童谣：

**
Pat-a-cake, pat-a-cake,
Baker's man!
So I do, master,
As fast as I can.

Pat it, and prick it,
And mark it with a T,
Put it in the oven
For Tommy and me.

做蛋糕，做蛋糕，
烤面包的人！
好的，我会尽快，
我的主人。

轻轻拍打，
刻上记号T，
把蛋糕放进烤箱里，
为了我和汤米。