Popular internet slang meaning "I secretly wrote this" or "I would've have made this if it had not already been made". In reference to "ghostwriting" where a person is paid to write a something but has to keep it a secret
Executive from big pharma: "How can we present the data from our new drug study in a credible, impartial light?"
Ghostwriter: "I'll ghostwrite the 'script, negotiate with a highly regarded physician for authorship, and submit it to the New England Journal of Medicine."
The double ghostbuster is the pinnacle of shitting achievements in which an individual manages two highly difficult elements (or ghostbusters) in one sitting.
A single ghostbuster is when one takes a dump only to discover on inspection that there is nothing in the toilet. Where is it? Straight down the U-bend? Who knows.
Another type of ghostbuster is where one takes a dump, wipes his arse and on expection finds the paper contains no evidence a shit ever took place. A clean break, so to speak.
A Double Ghostbuster, then, is the seemingly impossible combination of both occurances outlined above.
Winston: Ray, Ray, I've just done a Double Ghostbuster!!
Ray: Yeah right, whatever
Winston: It's true Ray. It was clean as a whistle!
Egon: It's statistically 1 in 14 million to pull off a double but it can be done.
Winston and Ray: F*ck off Egon
An innocuously or deceptively-named folder (e.g. "Ghostbusters Movie") on a computer which contains large quantities pornography or other illicit materials.
"Hey Danny, can you fix my computer?"
"Sure Jason"
"Here ya go"
"Alright. Oh cool you got the ghostbusters movie, can I burn it?"
"Uhh... ahh.. ummm...the ghostbusters folder...is something else"
"Wait... this isn't Ghostbusters... OH MY GOD THEIR BALLS ARE TOUCHING!"