Old Scratch or Mr. Scratch is a name of the Devil, chiefly in Southern US English. The name likely continues Middle English scrat, the name of a demon or goblin, derived from Old Norse skratte.
"Heat" by Michael Chitwood
A Coke bottle stopped
with a sprinkle head
sat at one end of the board.
She'd swap iron for bottle,
splash the cloth,
then go at it with the iron.
The crooked was made straight,
the wrinkled smooth,
and she'd lecture from that altar
where rumpled sheets went crisp.
"If Old Scratch gets his claws
in your thigh or neck,
you burn a thousand years
and that is the first day."
Our clothes got rigid,
seam matched seam.
Our bodies would ruin her work.