Somehow inspired by this thread (and I haven’t even started drinking yet!)
Dino #1: Hey, what do you think of these new mammal things?
Dino #2: I dunno, but I hear they’re pretty tasty!
[pointing at asteroid entering atmosphere]
What in THE HELL is that!?
Fearing comets in the sky is a silly superstition.
dammnit, too slow
Now that this thread has a few replies, I can confess. I looked at the “Dinosaur cloaca” thread and the first thing that came to mind was,
Female Brontosaurus to mate: “Honey, does this dress make my cloaca look big?”
Stegosaurus: “How many mammals does it take to screw in a lightbulb?”
Triceratops: “What’s a lightbulb?”
“Ve vill march ondt a rrrroad uff bones!”
Damn Nazi Tyranosaurs.
Dino 1: Why did the dinosaur cross the road?
Dino 2: I don’t know.
Dino 1: Because the chicken hasn’t evolved yet.
gronk!
Rex, do you believe in an afterlife?
Sure, Bronto, and if this dust ever settles, I’m going to have a position of power, have billions of mammals dependent on me, and I’m going to run around in trains, planes, automobiles, and ships.
Dang! My butt itches and these teeny tiny arms are useless!
We’re sure glad we elected Sarah Moasaur Palin as president. Nothing can go wrong now.
Never mind…it was really dumb.
“You’re so smart, Einsteinosaurus. I bet your brain is as big as two walnuts!”
T-Rex: I have a big head and little arms. I’m just not sure how well this plan was thought through.
Aw, come on…you’re worried about posting something “dumb” in a thread about talking dinosaurs? 
Hadrosaur to friend: Dang! Why did WE have to get stuck with these stupid duck bills?
Bronto 1: No matter how much I work out, my head looks to small for my body.
Bronto 2: Don’t worry about it, in a million years no one will even notice.
Brachiosaurus: You know, it just don’t get no better than this.
Triceratops: Yeah.
One stegosaurus to another: Clean your tail, dear, it’s got thag all over it.