What is a snozzberry?

The snozzberry is a fictional fruit from the British children's television series The Mighty Boosh. There's no real-world equivalent. Its defining characteristic, famously, is that it tastes like snozzberries. This is used as a comedic device to highlight the subjective nature of taste and the absurdity of trying to describe an unfamiliar flavor. Essentially, it's a joke – there's no actual description of what a snozzberry tastes like beyond "snozzberries."