I love doing this! Just thinking of these lines makes me smile. You guys already listed some of my all-time faves, but here, in the order they show up in the movie, are the rest of my favs:
Inigo (to the man in black):
Westley (to Fessik, whom he's just knocked out): Rest well, and dream of large women.
Westley: I told you I would always come for you. Why didn't you wait for me?
Buttercup: Well... you were dead.
Westley (to Buttercup when they enter the fire swamp): "It's not that bad." Buttercup gives him an "HUH?" look. "I'm not saying I'd like to build a summer home here, but the trees are actually quite lovely."
Miracle Max: "Sonny, true love is the greatest thing in the world. Except for a nice MLT: a mutton, lettuce and tomato sandwich, where the mutton is nice and lean and the tomato is ripe. They're so perky, I love that."
(I like this one so much because many years ago when I worked at Multnomah publishers, the leadership team was called...wait for it...the MLT. So these lines from Max always made me giggle.)
Inigo: "Let me 'splain. No, there is too much. Let me sum up."
Westley: My brains, his steel, and your strength against sixty men, and you think a little head jiggle is supposed to make me happy? Hmmm?
Clergyman: Mawwidge. Mawwidge is whut bwings us togevah todaay. Mawwidge, dat bwessed awangement, that dweem wifin a dweem... And wuv, twoo wuv, will fowoh you fowevah... So tweasha your wuv...
Thanks, everyone for playing.