Keyrock, known as "The Unfrozen Caveman Lawyer", was a recurring character created by Jack Handey[1] and played by Phil Hartman on Saturday Night Live from 1991 through 1996.
Keyrock became a defense and personal-injury lawyer, and in a later sketch, a politician running for the Senate on the platform of reducing the capital gains tax.
[2] He was portrayed as a selfish, well-dressed attorney who repeatedly claimed to be a simple-minded caveman, and would employ simple folk wisdom to win his cases.
The scene would then be accompanied by a song, beginning "He used to be a caveman...," showing Keyrock in animal skins beating a club against his hand, "...but now he's a lawyer!"
and showing Keyrock's clothes changing from animal skins to a suit, and his club replaced by hands gesturing to emphasize a point: "Unfrozen Caveman Lawyer!"
The running gag was that Keyrock would speak in a slick and smoothly self-assured manner—but with obviously feigned naiveté—to a jury or an audience about how things in the modern world supposedly "confuse and frighten" him.