This word is to define your acquaintance named "Julie". This simply is just a way to define someone who acts like someone else. You can also use it like this. Jimmish, Robotophurish, Ibozzish, etc.
Robotophur: I AM SUPER DUPER SNIPER GANG RICH! I ALSO HAVE POUTINE!
Prometheus: Uhhh sure, but stop acting julieish.