Definitely not. In normal conversations, we don't come across such phrases. It seems very specific to a particular, and perhaps very personal or made - up, situation. It doesn't fit into the typical language patterns we use in general communication.
It could be a very strange or inappropriate statement. Maybe it's some sort of made - up or misinterpreted situation where girls are laughing about something related to 'balls' which could be a reference to a toy ball or something else innocent. Without more context, it's hard to be sure.
Well, perhaps the girls have a different sense of humor than you expected. But in general, stories about such private parts are considered vulgar in most social settings. You might want to focus on more positive, friendly and appropriate topics to share with them, like interesting travel experiences or good books you've read.
Once there was a girl named Lily who was really into sports. During a co - ed soccer game, she accidentally kicked the ball and it hit a boy right in the balls. She felt so bad immediately. She rushed over to apologize and the boy was in pain for a while but eventually forgave her as he knew it was an accident.
One way is to be assertive. You can say 'Your laughter is inappropriate and disrespectful. I don't appreciate it.' This makes it clear that their behavior is not okay.
Maybe it's about two best friends who love kicking balls together. They are the central characters in the story and their friendship grows stronger through their shared interest in ball - kicking activities.
Take it as a sign that you've made a mistake. Try to change the topic to something more positive and light - hearted. For example, start talking about a funny movie or a cute animal you saw. And learn from this experience not to share such inappropriate content in the future.