In Bruges: “Why did you not wave at me yesterday when I waved at you yesterday?”
I actually watched the Flash Gordon SciFi TV series, partly. It was AWEFUL, but full of badly funny lines. Check it out for an irredeemably bad show.
“I’ve never seen anything like it! A dead body!”
“I think my pie should be eaten alone!”
One of my favorites from Red Green was the credo of their “Men’s Club” that they all said together at meetings:
“I’m a man…but I can change…if I have to…I guess.”
Sleeper: “He’ll do it, I’ve seen him shoot a nose before”.
“Looks like I picked the wrong week to quit sniffing glue.” Airplane! (1980)
And: “Joey, do you like movies about gladiators?”
From Ghostbusters
Dana Barrett: You don’t remind me of a scientist.
Peter Venkman: They’re usually pretty stiff.
Dana: You’re more like a game show host.
Venkman: You usually don’t see that kind of behavior in a major appliance.
Janine: You’re such a humanitarian, helping that man.
Egon: I don’t think he’s human.
Bill Murray: “Black guys help the white guys!”
Black soldier: “What did he just say?”
John Candy: “He said… Black guys… shoving black soldier help the white guys!”
It’s just a rediculous moment with stressed out people freaking out over a nothing thing, but it’s funny. 
From Big Trouble in Little China: “It’s fried RICE, you plick!”
Field Reporter: Are they slow-moving, chief?
Sheriff McClelland: Yeah, they’re dead. They’re all messed up.
Meet the Robinsons T-rex: I have a big head…and little arms
Bolt: “There’s a guard” “I’ll snap his neck”
Buffy: Hey Ken, wanna see my Ghandi impression?
Bashes Ken’s head open with a club
Lily: Ghandi?
Buffy: Well, if he was really pissed off.
“My father hung me on a hook once … once.” – Joe Piscapo in Johnny Dangerously
Exchange from an SVU about kidnapped frozen embryos a/k/a snowflakes:
Snowflake Lady: We believe all frozen embryos are people that should be given a womb to mature in so they can be adopted.
Finn: That ought to make a lot of gay and lesbian couples happy.
Snowflake Lady: Oh, no. We only support adoption to the right couples.
Finn: Yeah. Straight, white & Christian.
Snowflake Lady: We’re not prejudiced. Christians come in all colors.
Data: Hooey?
I had an onion on my belt, which was the fashion at the time. . .
That was Kim Chan in Lethal Weapon 4.
Forgive me if its been mentioned already, by Reverend Jim’s driving exam from “Taxi” alway cracks me up.
What… Does… The… Yel… Low… Light… Mean … ?"
Dr. Peter Venkman: Hee hee hee! “Get her!” That was your whole plan, huh, “get her.” Very scientific.
Dr Ray Stantz: Personally, I liked the university. They gave us money and facilities, we didn’t have to produce anything! You’ve never been out of college! You don’t know what it’s like out there! I’ve worked in the private sector. They expect results.
Frito: Yah I know this place pretty good, I went to law school here.
Pvt. Joe Bowers: In Costco?
Frito: Yah I couldn’t believe it myself, luckily my dad was an alumnus and pulled some strings.
For me it is…
“SED-A-GIVE?!?!”
“We thought you was a toad” - Oh Brother Where Art Thou
“You’ll finally be able to cook a decent meal” - Beetlejuice
“Funny…she doesn’t LOOK Druish” - Spaceballs
“That can only mean one thing…and I don’t know what it is” - Murder By Death
“By gum, it’s gum!”
“Wrong!”
–Willy Wonka and the Chocolate Factory (it’s all in the delivery)