(California and scattered prisons) The chief disciplinary officer of a prison; the principal keeper; the deputy warden; or the captain. “I’m hitting the porch (going to be tried for rule violation) today and the man with the brass nuts is gonna throw me in the hole (solitary confinement) sure pop (certainly).”

—Dictionary of American Underworld Lingo, Hyman E. Goldin, Editor in Chief, 1950.