Just one? Well my favorite is...
"Are you gonna bark all day,little doggie,or are you gonna bite?" (Michael Madsen as Mr.Blonde from Quentin Tarantino's Reservoir Dogs). I have that quote as the ringtone on my cellphone:p
i have a lot of others,though...
Other Tarantino quotes are "Either he's dead or alive or the cops got him or they don't" (Mr.Blonde,Reservoir Dogs), "You know what this is? It's the world's smallest violin playing just for the waitresses.(Mr.Pink,Reservoir Dogs), the "Say "What" again" sequence and "Ezekiel 25:17" speech (Jules in Pulp Fiction)
I also like..
SETH: " LOW PROFILE! Do you even know what low profile means? It is NOT taking hostages! It is NOT shooting officers! It is NOT setting fire to a building!"
Kate: "Where are you taking us?"
Kate: "What's in Mexico?"
(From Dusk Till Dawn)
" Hello, Clarice" and "A census taker tried to make me do a survey once. I ate his liver with some fava beans and a nice chianti.fffffffffffffffffffffff" (Hannibal Lecter in Silence of the lambs)
"I desperately want to make love to a schoolboy!", (Lloyd)
"we once successfully mated a bulldog and a shi tsu...we called it a bull$hit" (Harry)
"petey's head fell off!...he was pretty old" (Harry)
"she sent me a JOHN DEERE:p letter about how i never paid attention to her,or something. I don't know,i wasn't paying attention" (Harry)
"I'll have her liver with some FARVER :p beans and a nice chianti.fffffffffffffffffffffffffff" (Lloyd)
(Dumb and Dumber)
"Is that number one or number two?...I just want to know how much time i have (Ace Ventura:Pet Detective)
Achoo" (h)ey,Blinkin' !"
Blinkin' : Did somebody just say Abe Lincoln?"
Achoo: "Nah,man,i didn't say Abe Lincoln. I said (h)ey Blinkin'!"
Robin : Blinkin', i'd like you to meet Achoo"
Blinkin': A JEW, HERE!?
Robin: "No, Blinkin',not a Jew. Achoo"
Blinkin' : "Oh...Bless you"
(Robin Hood: Men in Tights)
"The snozzberries taste like snozzberries!" (Willy Wonks)
"YOU'LL SHOOT YOUR EYE OUT!!!" (A Christmas Story)
"Meow sequence" (Super Troopers)
"He who will learn to fly one day must first learn to crawl and then to walk; one cannot fly into flight" (Eddie Murphey's take on the Niezstche quote in Coming to America)
"Hell, son, look around. Would I be surprised?" (Captain Spaulding, House of 1,000 Corpses
"But i like the cookie" :( and "I FOUND MY NUTS!" :p (Over The Hedge)