Step-Roommate

Someone that lived in your house right before you did. You didn’t live together but your stories intertwine.

Yeah, my step-roommate is a hottie. Thought she was mean at first but it turns out she also lived in my room before me. So, yeah, that made a ton of sense.

step roommate

Roommates that are roommates, but fuck

John: "Hey Sari, wanna hang out?"
Sarah: "No, let's fuck."
John: "Okay step roommate!"