a popular old lullaby (= song sung to make a young child go to sleep).
Hush-a-bye, baby,
On the tree top.
When the wind blows,
The cradle will rock.
When the bough breaks,
The cradle will fall,
And down will come baby,
Cradle and all. In the US, the name and first line of the song is Rock-a-bye, baby . The tune is similar to Lilliburlero .