Here is how the song goes:

Jack Sprat could eat no fat
His wife could eat no lean
and so between them both, you see
they licked the platter clean

Jack Sprat could eat no sweets
His wife could eat no fruits
but what they held together
is wearing cowboy boots

Jack Sprat could drink no cola
His wife could drink no water
Jack couldn’t drink more than his wife
Because he is much shorter

Origins:

The name Jack Sprat was used of people of small stature in the sixteenth century.

The nursery rhyme appeared the first time 1639.