What is slipstream fantasy?

Excuse me, could you clarify what you mean by "slipstream fantasy"? Is it a genre of literature that blends elements of fantasy with other genres, perhaps in a way that defies traditional categorization? Or is it a term that refers to a specific style of storytelling within the fantasy genre? I'm intrigued by the concept and would love to learn more about it. Could you elaborate on its defining characteristics or provide some examples of slipstream fantasy works?