There are so many sayings with the word "Dutch" in them. Trying to explain them to people who are actually from The Netherlands can be quite funny. When we were growing up, my sister and I played a lot of jump rope. One of the most difficult - but most fun - tricks was with a double strand of rope, where we had to turn each strand into the other and jump both ropes. It required serious rhythm. We called it double-dutch. Now there are competitions for it.
Here are some amazing videos of girls and guys doing double dutch.
Double Duchess Cat Costumes
Double Dutch in Harlem