Good question, I wondered about that myself.
I asked some Scots, but the answer sounded so weird that I never got it down. It's something like 'Sgurr nan Catrahn', that's how I remember it. I write rr, to emphasize that you have to roll the rr's properly.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe