For the old timers in our group the movie we still quote a lot to this day is, Sword and the Sorcerer. Yup. Believe it or not. Think what you may of this movie, but there are too many good one-liners in this movie to pass up. Examples:
When the DM says a bunch of monsters suddenly show up, a PC will usually say: "Who dies first?!"
When an NPC talks trash to you, the PC responds: "That's a small threat...that's a VERY small threat."
When the fighters all want to kill the same creature, all will say this: "He's MINE!" (done is Cromwell's high pitched delivery of course.)
After someone takes damage: "Don't worry little girl, it won't hurt until it hits the bone."
For no reason what's so ever: "What your problem, potato-head?"
After the DM describes the biggest, baddest, ugliest, nether region monstrosity ever to bear down on us, a smart-alec PC will say: "I will allow you to live as long as you serve me, betray me, and I will joyfully send you back to rot in hell."
And the BEST line ever to start an adventure with: "Come now, let's be off. There's a battle in the offering! We've got kingdoms to save and women to love!"
There are many more from this movie but those are the first that come to mind. Hey, 3-bladed sword aside, this movie ruled.