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c.1500, slang, "beggar's child," originally northern, Midlands and western England dialect word for "makeshift or ragged garment;" probably the same word as Old English bratt "cloak," which is from a Celtic source (cf. Old Irish bratt "cloak, cloth"). The modern meaning is perhaps from notion of "child's apron." Hollywood Brat Pack (modeled on 1950s Rat Pack) is from 1985.
A child, esp an obnoxious or troublesome one
[1505+; origin unknown]
Bratwurst, a kind of sausage: a neighborhood more attuned to baseball, brats, and beer (1980s+)