A magpie is a loud-voiced black and white bird. If someone calls you a magpie, you should probably quiet down.
The magpie is a distinctive looking bird, with glossy black and brilliant white markings. Its sound is nearly as striking, famously noisy and almost jarring. This has led to another meaning of magpie, "someone who talks obnoxiously." You might describe your chatterbox neighbor as a magpie — and the word itself comes from the nickname Mag, short for Margaret and commonly used in slang English to mean "idle chattering."