Liar! Liar! Loin cloth on recent discovery of fire!
Your momma is so fat we had to use our stone tools to make the entrance of the cave bigger so she could get in and out.
He’s not the sharpest spearhead in the animal-hide-covered, decomposing dinosaur rib-cage hut where we store the hunting implements.
I don’t come to your job and scare away the wildebeests.
You wouldn’t know a wheel if it rolled up and helped you overcome thousands of years of prehistoric living.
What’s wrong? Sabertooth tiger got your tongue?
No shit Blarg. Dig deeper Glurg.
I wouldn’t touch you with a ten foot mammoth tusk.
I’ll shove his head so far up his caveman ass he won’t know his physical existence from his shadow cast on the cave wall by the fire.