It's been used to describe code that does A on server and B on client side, where A and B are deeply related but definitely not the same. It's not just code sharing, that's just a small part of it.
My argument is that it's a forced and silly misuse of the word.
I'm struggling to understand also how it came to be [ab]used in this context. To take an old Greek mathematics word and use it to mean something that it doesn't really mean? Why? Isn't that silly? Isn't it pretentious?