Please stop

My friend keeps calling me over lately, and I found out it's because they want me to 'cat jump' for them;; So how can I make them stop? Today, I met two friends at 8:20 PM. One friend I don't play games with and another who was talking while waiting for the traffic light kept saying 'cat jump, cat jump' to me. I just ignored them. Can someone please suggest other methods? I'd appreciate likes on my comment.