Totally going to let my inner geek free here today and list off some of my favorite words and phrases from science fiction and fantasy which I think should be applied in daily life. What got me thinking about this was the new Syfy show Defiance, which makes use of a number of loanwords transferred from alien tongues into English.
So, lets begin with Defiance:
Jaja - money
Shtako - Shit
Uses: "Keep your jaja, I don't need that shtako"
Hrekin - Shit (exclamatory)
Uses: "Hrekin!" *spits*
Shiny - Little harder to define, but I'ma go with "cool" or "good" or "just fine". Others have defined it as meaning "valuable".
Uses: "Everything's just shiny here"
Wheel of Time Series:
Blood 'n Ashes - generalized curse-phrase
Uses: "Blood 'n Ashes, we'll never get there on time"
Light - Another generalized exclamatory, akin with "God!"
Uses: "Light will it, we will be home for dinner"
Harry Potter Series:
Merlin's beard - An exclamation of surprise
Uses: "Merlin's beard! I've lost my Knuts"
Whammied - An expression for what happens when an artifact is used on you/backfires on you.
Uses: "I just got whammied; the top came off my blender"
Wibbly wobbly timey wimey stuff - a phrase denoting something which is too complicated to be easily explained at that time.
Uses: "Daddy, what are you doing with the engine?" "Wibbly wobbly timey wimey stuff, son"
That's all I got. Can anyone donate more?