My ancestry is as English–not just British–as the day is long, and I have never heard of this.
Mybe it got dropped when Grandpa lived on the Prairies…
Gilda Radner was American. She worked in Toronto for a few years, but was born and raised in the Detroit area.
We discussed this in a thread a couple of months ago.
Yes, we did, including the “Rabbi, Rabbi” variant.
Hadn’t heard of it and am from NZ.
I said it this very morning.
It is a tradition in our family, on my Mum’s side. My Mum is English, from Lancashire, if that helps you at all to pin it down to a region.
We do? 
Punch and a kick for being so quick.
C’mon! You’re just making stuff up now!
Never heard of any of this. I feel like I’m missing out. 
We do. For the first time in ages I managed to catch my wife with it before she got me. I didn’t give her the deadarm she usually gives me, though.
My wife got it from her dad, who’s from Bristol.
I’m English and I heard the “White rabbits” thing as a kid. We only said it once, though, not three times, and it had to be the first thing you said in the new month.
“Pinch, punch, first of the month” is very widespread, too. Google it.
My GF is from Yorkshire, and she says it, so maybe it’s a north of England thing.