This is the voice of a small child caught out. Krishna insists to his mother Yashoda that he didn't eat the butter, offers an alibi, blames his friends, and then, when that doesn't work, goes for her heart. The poem is loved because any parent has heard this argument.
The song is sung in the name of Surdas, a 16th-century poet of Krishna devotion, and is usually placed with the huge collection called the Sursagar. But attribution of individual Surdas padas is uncertain. Scholars such as John Stratton Hawley have shown the collection kept growing for centuries: the oldest dated manuscript, from 1582, has only a few hundred poems, while later editions run to thousands. We have not traced this one to an early manuscript. Other poems with nearly the same opening also go under his name.
It is written in Braj Bhasha, the speech of the Mathura and Vrindavan region, which was one of the main languages of North Indian poetry for centuries. Its forms are close to Hindi but not the same: khāyo for khāyā, morī for merī, bhorī for bholī. Printings differ on small spellings too.