цапнуть(о животном: He tries to be tough and will grab and try to bite. It's worked for him before. He got me good once when he first came in my house and didn't know better. – сильно меня цапнулART Vancouver)
постоять за себя(to be strong and confident enough to treat people in the same way that they treat you, especially in an argument or a fight: There's a lot of teasing and fighting among the crew, and you have to be able to give as good as you getTamerlane)
