I saw one a few months ago that said “Bad cop. No Donut.”
Seems to me that person had a big set of balls.
I have a jpeg of a tshirt slogan that has a picture of the confederate flag that says: “You lost and you marry your sisters”
I often toy with the idea of printing it out on sticky paper, making bumperstickers and putting them on cars that are flying the confederate flag. These people piss me off. This is Pennsylvania fercryinoutloud. Last I checked PA was on the union side.
I like them obscure. I saw a car sticker in England once that just read “YOU PEOPLE”.
I immediately imagined Alan Partridge saying it, and when the car’s owner returned he vouchsafed that it was indeed Partridge who’d inspired the sticker. He had also considered “THIS COUNTRY”.
My nurse has “THIS IS A LOCAL CAR FOR LOCAL PEOPLE”. But that’s a bit obvious!
Damn, I was going to say that one.
Got these from a thread here some time ago:
On a solid red bumper sticker: If this sticker is blue, you’re driving too fast.
Vegetarian is an old Indian word for “bad hunter”
If Barbie is so popular, why do you have to buy her friends?
Madness takes its toll. Please have exact change.
All those who believe in psychokinesis raise my hand.
A bartender is just a pharmacist with a limited inventory.
Beauty is in the eye of the beer holder
I prefer the more old-fashioned:
REUNITE PANGAEA
D
A few of my favorites.
Eat your honey, a million bears can’t be wrong.
Eat salmon - The other pink meat. Bob Zany
I brake for hallucinations.
And of course the current MN obligatory one, “Wellstone in '08”
A friend and I were driving to another friend’s house to get stoned when we saw a hippie van (you know the kind) with an “El Cajon Says No To Drugs” (El Cajon is a suburb of San Diego), with the “No” scratched out in black marker. So the sticker actually read “El Cajon Says To Drugs”. I’m still not sure what exactly to make of that.
I like the one a coworker gave me last week:
Vote the son-of-a-Bush OUT!
“Get Grier out of HERE”
Yea, it is very regional. But, just imagine an entire city and let us say that 1 out of 7 cars you will see will have this on the back. If I could only explain…
I would rather be hated for who I am than be loved for who I am not.
Good way to live.
One that resides on the Undercover Truckster now reads…
Remember Pillage first…THEN burn.
Others have been…
DON’T PANIC
Come out, Come out Where ever you Are.
A pentagram and the word CLERGY
WWKD? (what would Kali do?)
667, Neighbor of the Beast
and…
Assume Nothing
I’ve got a place reserved on my bumper for 1 every few months. I’m considering renting the space. 
I think there was one that read “If you can read this, you’re too geek” in ascii…
That’s so good, I’d probably get a tattoo of it. Thanks for the laugh.
Saw this one today:
"I want to be Barbie when I grow up. That bitch has everything "
One I heard about on the radio:
“Is it Facism yet?”
Don’t Proselytise before you first Philosophise
I have an american indian coworker that has a bumper sticker that says “Custard died for your sins” on his truck with a pair of crossed arrows.
I recall one from highschool;
“It’s exciting to be Polish”
And my all-time favorite, mainly for the randomness;
“Eat Moose. 50,000 wolves can’t be wrong”
My all-time favorite is the one I had made for me in Cairo, Egypt. Car horns are connected to the gas pedal in Cairo and the noise is amazing.
My bumper sticker (in Arabic)?: “Honk if you love Jesus”.
I was asked to remove it by those without a sense of the profound.
An oldie but a goodie:
Save a tree… Eat a beaver.