1. Misbehave (v) /ˌmɪs.bɪˈheɪv/: to behave badly: hư
Example: I was always getting in trouble for misbehaving at school.
 
 
2. Disobedient (a) /ˌdɪs.əˈbiː.di.ənt/: refusing to do what someone in authority tells you to do: hư, nghịch
Example: a disobedient child
 
 
3. Throw a fit/tantrum = to experience and show a strong feeling of anger, especially suddenly: nổi cơn tam bành
Example: My mother threw a fit when she saw what a mess we'd made of her kitchen.
 
 
4. Run wild = If someone, often a child, runs wild, that person behaves as they want to without being controlled by anyone: hư hỏng
Example: Those boys have been allowed to run wild. 
 
 
5. Spoiled (a) /spɔɪld/: A spoiled child is allowed to do or have anything that they want, usually so that they behave badly and do not show respect to other people: hư hỏng
Example: You’re behaving like a spoiled brat!
 
 
6. Be up to no good = to be behaving in a dishonest or bad way: gian lận, dối trá
Example: He certainly looked as if he was up to no good.
 
 
7. Forget yourself = to act in a socially unacceptable way because you have lost control of your emotions:
Example: He was so angry he forgot himself and swore loudly.
 
 
8. Mischievous (a) /ˈmɪs.tʃɪ.vəs/: behaving in a way, or describing behaviour, that is slightly bad but is not intended to cause serious harm or damage:
Example: a book about the mischievous antics of his ten-year-old daughter
 
 
9. Rude (a) /ruːd/: not polite; offensive or embarrassing:
Example: It’s rude not to say "Thank you" when you are given something.
 
 
10. Fool around—  /fuːl/: to behave in a silly way, especially in a way that might have dangerous results: đùa giỡn
Example: Don’t fool around with matches.
 
11. Bad-manners = The treatment of other people in an impolite or discourteous way, or incorrect behaviour in public: cư xử tệ
Example: In some cultures, it is considered to be bad manners to talk with your mouth full.
 
 
12. Misconduct (n) /ˌmɪsˈkɒn.dʌkt/: wrong or immoral behavior of someone in a position of authority or responsibility
Example: criminal misconduct
 
 

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