NotSpaghetti
"A poke in the eye with a sharp stick" is the variant I inherited.
This is the first time I've really thought about it! 
Mine was ‘ Better than a wasp ( pronounced ‘wahsp’ doon your knickers)
My granny wasn’t as polite as JackyB’s, ‘ Six o’ clock, the fleet’s in, and no’ a hoor painted’
She also described herself like ‘a hoor at a flittin’ ‘ if she was not properly groomed ( which never happened!)
Something which happened a long time ago happened ‘ before God left Kilmarnock’
A few of my favourites, mostly said to children, are
Hard lines ( as the man said when he fell off the train)
It’ll not be long now ( as the monkey said when the train ran over its tail)
Something very annoying is ‘enough to make a dog bite its father’
Something is ‘in two halfs, like the Pope’s bum’
A sore tummy is ‘ a pain in your pinny, right through to your frock’
And many,many more