What is up with Rabbit Rabbit???

I don't know when it started, and I don't know why it started, but I wish it would stop.  For years people, including my own brother and sister have said "Rabbit, Rabbit" to people on the first day of each month.  When I was younger I got into it a little, but thank goodness I got out of it. 

When my brother was in college it became a serious competition with a friend of his who could say it first.  Their escapades became more and more extravagant.  I remember on time, I woke up on the first of the month really early, around 6am, only to find my brothers friend trying to string up two stuffed rabbits between the gates of the driveway to our house. I was like, "Gee wiz, get a life." 

I have seen it pop up a few times on facebook, but thankfully it hasn't continued.  If it does, I may have go do some "Wabbit hunting".