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43 is an interesting lucky number. What's the story behind that?
It originates from a Rowan Atkinson standup sketch, in which he is a waiter in an Indian restaurant, and the group of nine diners orders (amongst other things) 43 poppadoms between them.

It's a really rather funny sketch, and is well known to the circle of my friends who all play darts together. After certain people started scoring 43 quite frequently, we all started referring to scores of 43 as "poppadoms"; and then I finished legs from 43 a couple of times in one match (43's quite a nice finish, as it happens), and it kind of spiralled from there.