fractious \FRAK-shuhs\, adjective:
1. Tending to cause trouble; unruly.
2. Irritable; snappish; cranky.
In Marshall's case, the experience of dealing with a clamorous band of younger siblings, earning their affection and respect while holding them to their tasks, proved remarkably useful in later years when dealing with fractious colleagues jealous of their prerogatives.
-- Jean Edward Smith, John Marshall: Definer of a Nation