the heterosexual relationship between
females. It allows a lot more interaction than a
bromance because they are females. "No
homo" is implied.
Guy: "Hey! are you two in a relationship?"
Girl: "Nah. Are you
dumb? It's a sismance. You wouldn't understand because you're a guy."
Guy: "Sismance isn't
real."
Girl: "Well, neither is this relationship between you and me."