Karen is a term used to describe a person, typically a woman, who behaves in an entitled, rude, or overly demanding manner. In this scenario, Karen might be seen telling a girl not to ride her bicycle because she is not a boy.

Karen might approach the girl in a condescending manner and say something like, "You shouldn't be riding your bike. That's not something girls do. It's only for boys." Karen might try to convince the girl that her gender is a limitation that prevents her from participating in activities that are traditionally associated with boys.