any of several species of birds of the crow family with a very long tails and black-and-white plumage: genus Pica
any of several species of birds resembling or related to the magpie; esp an Australian bird with black-and-white plumage: genus Gymnorhina
a person who chatters noisily
a person who collects objects in a random fashion
the outermost ring but one on a target
a shot that hits this ring
Mag (a nickname for Margaret) + pie2. The bird was formerly known as a maggotpie, maggot representing Margaret (compare the use of first names in Robin redbreast and Tomtit), and pie being pied, an allusion to its black and white plumage