Hello!
Back in the Summer of Love ('67) when I was 5 years old, I learned a playground game in which we used to -
'Run-to-London-and-back!' - Meaning to run towards and around the person giving the command - 'Do-the-squashed-tomato!' - Meaning to run, with arms folded, at the person giving the command and - 'Hipplecrip!' - Meaning to walk, heel-to-toe, like one does on the gym beam, towards the person giving the command.
I cannot remember the point of the game and my sister, who is 22 months younger, does not remember this game at all, even though we attended the same primary school. I have used the word all my life and, I guess, folks have never queried the word because I have synchronised using the word with doing the action.
Recently however, myself and my 4 year old nephew - he was bored of sitting in the shopping trolley - decided that it'd be fun to run about, arms out, singing 'Those Magnificent Men In Their Flying Machines' with some obvious - action-to-lyric choreography - and at one point we did the hipplecrip. We were, of course, told off by 'she who knows better',

and several days later, having "www'd" the word, I was asked by 'she who knows better' - "What does hipplecrip mean?"
Am I going mad? Please say that someone else out there in "wubble-you-land" has recollections of the word, hipplecrip.
Thank you, Mark