a person, especially a child, who behaves badly 没有规矩的人;(尤指)顽童 a spoiled/spoilt brat 被宠坏了的顽皮孩子 Why does that irritating little brat ask so many stupid questions? 为什么那个气人的小顽童会问那么多愚蠢的问题?
Oxford Collocations DictionaryBrat is used before these nouns:- pack
Word Originmid 16th cent.: perhaps an abbreviation of synonymous Scots bratchet, from Old French brachet ‘hound, bitch’; or perhaps from dialect brat ‘rough garment, rag’, based on Old Irish bratt ‘cloak’.