What is plidder pladder?

Answer 1

The phrase is "pitter patter" or the word "pitterpatter". It means to walk with quick light steps or something that makes tapping sounds.

Examples:

The children pitterpatted from window to window in their rooms upstairs, hoping to see Santa and his sleigh. But alas, each tired and fell asleep long before he arrived.

The mother was so ill she could hardly stand the pitterpatter noises of the nurse's soft-soled shoes.

"Young lady, you must learn to pitterpatter gracefully rather than stomp from room to room," the father told his child.

The pitterpattering of raindrops from the light spring storm lulled the baby to sleep.

In addition to waves softly rocking the houseboat, the young girl snuggled under the covers while listening to the pitterpatter of rain on the boat's roof and decks.

After all her children started school, the mother missed the pitterpatter of small feet around the house.

The bandmaster stopped the young man who played the drums, and told him, "Stop the pitterpatter! Be robust! This music demands that you strike that drum!"

Answer 2

"Plidder-pladder" typically refers to meaningless or nonsensical chatter or speech. It can also be used to describe the sound of someone walking or moving about in a hurried or haphazard manner.