What is what does it mean when a girl flips her hair behind her ear?

When a girl flips her hair behind her ear, it could mean several things. In most cases, it is a subconscious or a body language gesture that she makes to draw attention to her face, frame it or reveal a shy or coy personality. In some cases, it could indicate that she is flirting or trying to appear more attractive to someone she likes. It could also be a sign of nervousness or an attempt to maintain a certain appearance in social situations. Ultimately, body language is subjective and dependent on context, so there is no one definitive answer to what flip hair behind the ear means.