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1.
High quality cocaine.
"got space junk?"

"give me some of that fucking space junk!"
by spacestud August 11, 2006
 
2.
The dead satellites, discarded rocket casings, and so forth that orbit the Earth, creating a hazard for space shuttles.
With all the space junk that gridles the planet it is a wonder that NASA hasn't done more to clean it up.
by OneBadAsp October 20, 2006
 
3.
Redundant IT equipment that litters your life or office
I can’t fuckin move in here for all this fuckin Space Junk!
by SupportMonkey007 February 03, 2011
 
4.
Abandoned Facebook Groups, Blogs, and web sites that float meaninglessly through cyberspace. Named after the tons of Space Age detritus in orbit around the Earth.
"Find any good blogs about John Kerry?"

"Nothing but space junk"
by TMegg May 12, 2009