Chinese word (那个) meaning "that one" but used as a common placeholder in conversations, much like "Err..." or "Um...". Its pronunciation is uncomfortably close to the english word "nigger". Has the capacity to create very awkward situations.
My uncle almost got beat up at the store today. He asked for a black employee to help him get an item high on a shelf, then started saying "Na ge! Na ge!" to show what he wanted.