Well, you know what a hand is, don't you.
And you know what an ism is...
...so, handism: what's that all about?
My uncle's life was completely changed by handism. He wanted to be a hairdresser, but no one would take him on because he was left-handed. He ended up running a pub.
That's not the end of the story, though, because his daughter did become a hairdresser - and his grandson has become a very famous one.
Anyway, that's by-the-by. Handism is a rubbish word. I mean, it sounds as if it's a prejudice against hands - and bonkers would do nicely for that.
Mind you, bonkers would probably do for prejudice against left-or right-handed people, too.
Sunday Rest: handism. I've no idea where this word came from. I can only presume the coiner has buried his identity out of simple shame.