Cách sử dụng
The expression "weak at the knees" means to feel weak or faint due to a strong emotional or physical reaction, such as excitement, fear, or attraction. It is commonly used to describe the feeling of being overwhelmed or losing control of one's body. This expression can be used in a variety of situations, such as when someone meets their celebrity crush or experiences a particularly scary ride at an amusement park. It is important to note that this expression is informal and should be used in casual conversations with friends and family, rather than in formal or professional settings.