Meaning

noun a very troublesome child

noun a small pork sausage

originEarly Modern English (c. 1500) slang term meaning "beggar's child". Possibly from Scots bratchet (“bitch, hound”), in which case it would be a doublet of brachet. Another possibility is that it was originally a dialectal word, from northern and western England and the Midlands, for a "makeshift or ragged garment," from Old English bratt (“cloak”), which is from a Celtic source (Old Irish brat…

Etymology from Wiktionary, CC BY-SA 3.0