If that is a joke then accept the joke unless you also dont give a joke about them. Bullying is just normal for a close friends but one the bullying becomes severe then you should decide as soon as possible before it gets worse
Talk to your friends and tell them what you feel everytime they bullied you.If they dont stop after talking to them then it's the right time for you to look for better friend because if they are your true friends they will undestand how you feel.If they dont stop and continue bullying you and to the point hat they involved your family then stop hanging out with your friends.