Dumb joke? That’s one of my favorites! Although to nitpick: I always heard it “so he gave it to her.”
So the judge says to Mickey, “You can’t divorce Minnie just because you say she’s acting crazy.” And Mickey says, “I didn’t say she was acting crazy; I said she was fucking Goofy!”
A guy walks into a bar with a giraffe. The girraffe sits down on the floor while he has a drink. The man goes to walk out, and the barman says, “Hey, you can’t leave that lyin’ around here!”
The man replies, “It’s not a lion, it’s a giraffe.”
What do you call a fish with three eyes?
A fiiish
What’s the best time to go to the dentist?
Two-thirty.
What’s blackandwhiteandblackandwhiteandblackandwhiteandblackandwhite all over?
A nun falling down stairs.
What’s blackandwhiteandblackandblue all over?
Same nun the day after she fell down the stairs.
And one more for the road (I looooooove this joke):
Whats blackandwhiteandgreenandwhiteandblack and smells terrible?
Two skunks fighting over a pickle.
Thank You Dopers! I’ll be here all week.
[Wild West accent ON] Well around here, stranger, we kinda reckon that ‘gave her one’ means summat else, see? [Wild West accent ON]
How do you get two tigers in a car?
One in the front, one in the back.
How do you get two elephants in a car?
You can’t - it’s full of tigers!
How do you get two whales in a car?
Down the M4. 
:smack: 
What did the fish say when he swam into a concrete wall?
“Dam!”
One hydrogen atom says to another , “I’ve lost an electron!”
“Are you sure?”
“I’m positive!”
Ok you have to say this one out loud…
Knock Knock.
Who’s there?
I’m full up.
I’m full up who?
<giggle>
Why does the Marxist only drink herbal tea?
Because proper tea is theft.
What’s black and white and can’t through a revolving door?
A nun with a spear through her head!
Why did the belt get arrested?
It was holding up the pants.
What do you get when you cross an elephant with a grape?
elephant grape sin(theta)
A woman walks into a bar with a duck under her arm.
The bartender says, “Hey! Where’d you get the pig?”
The woman says, “It’s a DUCK, not a pig!”
The bartender says, “I was talkin’ to the DUCK.”
Q. What do you get if you cross a mosquito with a mountain goat?
A. You can’t. The mosquito is a vector and the goat is a scaler!
Where are an elephant’s sex organs?
In his feet–if he steps on you, you’re fucked.
And since I don’t think this one’s been done yet …
What’s black and white and red all over?
A nun in a blender.
And for the ladies …
What do you call a three-foot man with a ten-inch tongue who can breathe through his ears?
Perfect.
Where do you find a dog with no legs?
Right where you left him.
What do you do when you break a toe?
Call a toe truck.
How do you get down off an elephant?
You don’t, you get down off a duck.
What do you call a boomerang that doesn’t return when you throw it?
A stick.
What’s the difference between a dead lawyer in the road and a dead skunk in the road?
There are skidmarks in front of the skunk.
A guy goes to a doctor and says, “Doc, I don’t know what to do. Every night I dream I’m either a wigwam or a teepee. I’m a wigwam, I’m a teepee. I’m a wigwam, I’m a teepee. Can you tell me what’s wrong with me?”
The doctor says, “Yeah. You’re too tense.”
this one is a little longer, but it’s good and dumb.
A traveling chess team is returning to the hotel after a day long chess tournament. They congregate in the hotel lobby and discuss the events of the day, moves they made, games they won. The hotel clerk approaches the captain of the team and says
“I’m sorry, but you are going to have to return to your rooms.”
the captain replys “I don’t understand, what is the problem?”
to which the clerk responds "well sir, it seems some of our guests just don’t want to listen to chess nuts boasting in an open foyer
The eighties version of the nun joke:
What’s black and white and red all over?
A nun in Guatemala.
Another 80’s joke:
Why did the village idiot wear condoms on his ears?
So he wouldn’t catch hearing aids.
How do you sell a duck to a deaf man?
Caution: this is a stupid, and I do mean stupid, joke.
scream at the top of your lungs
DO YOU WANT TO BUY A DUCK?