Used to emphasize the main point in an argument or discussion. When debating, always focus on the nub of your point.
Pro Tip 2/3
Metaphorical Use
Can be used metaphorically to refer to the heart of the matter, not necessarily a physical location. We need to reach the nub of the issue before we can find a solution.
Pro Tip 3/3
Abstract Concepts
Often related to complex or abstract ideas, rather than concrete items. The philosopher attempted to explain the nub of existence.