Google Lens says it's an Ornate Tiger Moth
Euplagia quadripunctaria, the Jersey tiger, is a day-flying moth of the family Erebidae. The species was first described by Nikolaus Poda von Neuhaus in 1761. The adult wingspan is 52–65 millimetres (2.0–2.6 in), and they fly from July to September, depending on the location.
Oh, sorry. Thought you wanted to know the origin of a word...

Where was it spotted?