It's possible that the term is being used in a specific context or community where it holds a particular meaning.
To understand what "friendship-ism" might represent, we need more context. For example:
* Is it a neologism (newly coined word)? If so, what are the intended meanings?
* Is it being used in a specific social group or online community? The meaning might be understood within that group.
Please provide more information about where you encountered this term and what context it was used in. With more context, we can better understand its potential meaning.