Meaning

noun long-tailed black-and-white crow that utters a raucous chattering call

noun someone who collects things that have been discarded by others

noun an obnoxious and foolish and loquacious talker

originFrom Mag, a nickname for Margaret that was used to denote a chatterer, + archaic pie (“magpie”), from Middle English pie, pye, from Old French pie, from Latin pīca, from Proto-Indo-European *(s)peyk- (“woodpecker, magpie”). Displaced native Old English agu (“magpie”) and Middle English aguster (“magpie”), whence English haggister.

Etymology from Wiktionary, CC BY-SA 3.0