The term originated from a misperception in the movie "The Lincoln Lawyer" that the protagonist, Mickey Haller, has to run his office out of his car. Although his clients are far from one-percenters, he appears to run a modestly successful law practice. The movie does not disclose why Haller prefers to use his car as his office.
Judge: counselor, what evidence do you offer to support this new plea of insanity?
Chicken Lawyer: Well, for one, they done hired me to represent them.
:::Judge bangs gavel:::
Judge: Insanity plea is accepted!