Palsy-walsy is a slang term that was first recorded in 1930-35.
It is a rhyming compound based on the adjective palsy, which was first recorded in 1925-30 and comes from pal.
Pal was first recorded in 1675-85 and comes from a variant of the continental Romani word phral, “brother, mate,” ultimately from Sanskrit bhrātṛ “brother.”
EXAMPLES OF PALSY-WALSY
The salesperson’s overly palsy-walsy attitude made the customer feel uncomfortable.
I don’t like how she acts all palsy-walsy with me when she needs something.