brat
noun/bræt/
/bræt/
(informal, disapproving)- 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?
那个烦人的小家伙怎么会问这么多愚蠢的问题呢？
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’. - a spoiled/spoilt brat