Saw a great one last night:
Seen any good ones recently?
A couple of my favorites:
My Karma ran over your Dogma
Og help me be the persom my dog thinks I am
My baby animal is cuter than your honor student.
My other car is also a Porsche…
</Douglas Adams>
Of course, we can guess what the sticker-ed car in question is…
One of my favorites was upside-down on an obviously off-road-ready Jeep Wrangler:
**If you can read this, turn me over**.I have a tee-shirt “My goal in life is to be the person my dog thinks I am”
I like, as a bumper sticker “Dog is my co-pilot”
“You can make me rise, but I refuse to shine”
Kinky Friedman is running for Governor of Texas. I’m partial to “My Governor is a Jewish Cowboy”
In America Anyone Can Become President
That’s One Of The Risks You Take
“Stop Honking, I’m On The Phone”
And I still like “Caution, I drive like you do”
[size=2]DON’T TAKE CANDY FROM STRANGERS
UNLESS THEY OFFER YOU A RIDE[/SIZE]
I have one (not on my car, just tacked to my wall) that has The Tick and reads:
“Honk if you love Justice!!”
I got it in college and should have put it on that car, since it was crappy and a bumper sticker wouldn’t have devalued it any. But my current car is too nice for anything like that. I need to get a beater car that I do nothing with but put bumper stickers on. 
Sorry I Missed Church, I’ve Been Busy Practicing Witchcraft and Becoming a Lesbian
My favorite is on the wall in my kitchen, not the truck:
Please don’t tell my folks I’m a fireman. They still think I’m a piano player in a whorehouse.
I love it.
A few of my favorites from college (and one a teacher had on a filing cabinet in high school):
SAVE A WHALE…HARPOON A FAT DUDE
WHO WOULD JESUS BOMB?
SAVE THE ALES (with a little picture of a frosty mug)
“Sure you can trust the government. Just ask an Indian.”
“Guns don’t kill people. Drivers with cell phones do.”
That second one I really like. I was neary killed by an idiot 17 year old girl talking on her cell phone.
My favorite is still a red sticker that says “If this sticker is blue, you’re driving too fast.” If light is moving toward you and you are approaching the light source (or it’s a approaching you) at a very high speed, the colors of the light coming toward you shift from redder shades to bluer ones. This is known as “blue shift” - you can google it. The joke is that the shift is absolutely miniscule and negligible until you get to speeds approaching the speed of light.
I saw one with a line of elephants holding the tail of the one in front of it, but the very frontest elephant was upside-down. It said “Subvert the dominant pachyderm.”
Going to breakfast one morning there was a car in the lot with a, “Give War A Chance,” sticker. When I walked over to get a better look there was a human shaped target in the back with 5 in the heart ring and 5 in the head.
Ted Kennedy’s car has killed more people than my guns. This is often seen in the same lot.
My three favorites;
Jeez if you love honkies.
Don’t undertake vast projects with half-vast ideas.
My child has enough self-esteem that I don’t need to post his achivements on the back of my car.
Peace - DESK