MSBP stands for Munchausen Syndrome by Proxy, which is a specific subtype of Munchausen Syndrome, a factitious disorder characterized by the fabrication or induction of illness in another person, typically a child or person under the care of the perpetrator. It is a rare but serious condition where a person, usually a parent or caretaker, deliberately produces or causes symptoms of illness in another person, often a child, in order to gain attention or sympathy from others.

For example, a mother with MSBP may fabricate symptoms of illness in her child, such as making the child vomit, or even poisoning the child to make them appear sick. She may also exaggerate or falsify the child's symptoms to doctors and hospitals, resulting in unnecessary medical procedures and treatments.

It's worth noting that MSBP is considered as a form of child abuse and it can have serious consequences for the affected child's physical and mental health. MSBP is a rare disorder, but it can be difficult to diagnose because the perpetrator often goes to great lengths to conceal their actions. The diagnosis of MSBP should be made by a qualified mental health professional with experience in this area and should be based on an in-depth evaluation of the child's medical history and the caregiver's behavior.