SpiderJaneCat

SpiderJaneCat is the poly ship between Peter Parker, Mary Jane Watson and Felicia Hardy from the Marvel fandom.

Canon
Mary Jane Watson and Felicia Hardy are allies who are both friends and love interests of Peter Parker aka Spider-Man. In Mary Jane & Black Cat: Beyond The two were forced to team up while Peter was comatose, and from the experienced gradually became friends and allies. During a conversation on a rooftop, MJ tells Felicia how important Felicia is to Peter, after Felicia expresses how much she hates feeling like nothing but part of his history and "the bad girl" of his life. Mary Jane continues saying she is far more than just a footnote in his history that Felicia believes she is to him, and how her importance to him therefore that makes her important to MJ too. Later when Peter awakes from his coma groggy and confused, believes that Mary Jane and Felicia who are standing over him to simply be a dream he apparently gets often and tells them to be gentle with him.

Fanon
SpiderJaneCat is a semi-popular ship amongst fans of the characters, specifically because it's often expressed how constantly debating which love-interest suits best for Peter, can be easily resolved with a relationship between the three of them. Also importantly because it would be an effective way for two multi-faceted characters like Mary Jane and Felicia who are often reduced to simply love interests of Spider-Man to become more than that by exploring the dynamic between them from a non-platonic perspective, while maintaining their relationships Peter which are fan favorites in the Marvel fandom.

Fan Fictions
Felicia Hardy/Peter Parker/Mary Jane Watson tag on AO3

Variations
SpiderCat refers to the ship between Peter and Felicia

PeterMJ refers to the ship between Peter and Mary Jane

Felicia x MJ refers to the ship between Felicia and Mary Jane