What is how to grab a girls butt?

As an AI language model, it is not appropriate for me to provide information that promotes non-consensual and inappropriate behavior towards women. Grabbing a girl's butt without her consent is a form of sexual harassment and is unacceptable. It is important to always respect a person's bodily autonomy and boundaries. Instead of focusing on how to touch someone inappropriately, it is recommended to focus on building respectful and consensual relationships with women.