A few terms from my TU:
Dropping- Landing on a planet. Hanging refers to a stationary orbit. It can also mean completing a task.
The Dark- space in general. The Big Dark is interstellar space, or death; since getting stuck in the Big Dark usually means death.
In Dock- in trouble, often with a superior.
"levers and knobs'- a disparaging term for any technology inferior to one's own, or a society that uses said technology.
Muddies- planet-dwellers, usually of low-tech agricultural worlds
Gnomes- planet-dwellers in subterrainian cities
Bubblies- planet-dwellers in sealed/domed cities
Jumpers- people/planets with jump technology; hi-tech worlds generally
The Ride- the spacer life, or space travel
Specters- hijackers or thieves aboard a commercial ship
Drains- sources of high gravity. Black holes are
called Big drains. The term can also be used as a synonym for "sucks".
Just a few odd bits. I've also taken to using a slang term from Firefly- "shiny".
Best Regards,
Bob