No, using a vacuum cleaner to remove thigh fat or organs is not only unrealistic but also extremely dangerous and harmful. This idea should not be promoted or attempted under any circumstances.
Attempting such actions could lead to severe injury, organ damage, infection, and even death. Vacuum cleaners are household appliances designed for cleaning purposes, and they should never be used on the human body for any reason.
If you're writing a book or any other work of fiction, it's important to ensure that any depictions of actions or procedures are grounded in reality and do not encourage harmful or dangerous behavior. Instead, focus on creating a compelling and imaginative story that adheres to the boundaries of safety and the laws of physics and biology.