A Pitboing is a another term for fart. Coined by KB in the mid 1980s it was first used as a polite way of expressing ones gastric release. This is especially true in public as the word is not largely known outside of the New England seacoast.
Back when it was unlucky to have women aboard ships. The crew needed a solution to their sexual needs. This task was assigned to the 'Pitboy' (usually around 12-15 in age) who would take up position on one side of the glory hole while he 'serviced' the crew members on the other side.