Anything HK-47 (I think that's the evil robots name) says.

Also, when you try getting dark side points...

"Thank you for saving me." - Old man after you save him from tugs
"Shut up and give me your money or I'll kill you." - You
KotOR

Watching it being played at the moment, hopefully gonna get a chance to play it later tonight though ^^ I heard that one and nearly fell out of my seat laughing.

I don't trust anyone, I have my reasons...

more from KOTOR

Right, then I'll be over here vomiting. - Some new game for the Xbox, can't remember name.

HK is t3h funn3h.

HK-47: Negatory: Err, no, master. You are not a droid, however, and therefore your skills are limited by the physical capabilities of your meatbag extremities. Or somesuch.

PC: You don’t have to call me ‘master’, you know.
HK-47: Query: Don’t I? I always thought organic meatbags enjoyed such forms of address.

My favorite:

HK-47: There is a 98% probability that that this Jawa meatbag is searching for his missing companions.
PC: What about the other 2%?
HK-47: That he is looking for trouble and should be blasted right away. But that is just wishful thinking on my part

"Dang... I was looking forward to crackin' some heads."

Dunno who... KOTOR

Probably the war guy... Uses big guns... What's his name...

"All your base are belongs to us."
Don't know who said it, don't know what game it's from, but it's the most infamous case of bad translation ever.

P.S. I'm not quite sure whether or not this is exactly how it goes. Maybe it's bases.

Cats. Zero Wing.

And is HK-47 that little droid in KoToR that you had to steal from that one guy? I havent played in a while...

I AM THE GRIM REAP *cough cough cough* *clears throat*, ah, actually, my name's Greg...
Greg the grim reaper ~conquers bad fur day

I the great Garland shall knock you down!!!!- FF 1 (garland)