Gaudy Welsh is today's term, and it's closely related to Gaudy Dutch. I'm bringing this up today because I just happen to have a Gaudy Welsh teapot and biscuit jar in my possession right now:
These colorful pottery pieces were made in England beginning around 150 years ago. Gaudy Welsh pieces are hand decorated with cobalt, rust, pink, green and touches of gold or copper lustre in various elaborate patterns:
Gaudy Welsh pottery was actually a copy of Japanese Imari style pottery. For some reason, the British didn't care for it as hoped by the pottery manufacturers, so much of it was shipped to the U.S., where it was well received.
The way to tell the difference between Gaudy Welsh and Gaudy Dutch? Gaudy Dutch would not have the gold or copper lustre accents and the pottery pieces themselves are of a lighter weight. The tea cups won't have handles (many years ago, "tea bowls" were used instead).
Gaudy Welsh pieces are more recently made than Gaudy Dutch, and more affordable. Both of my pieces shown here are priced under $100. Gaudy Dutch versions would be several hundred dollars a piece.