Xander frowned and looked at Tonks, who was pale and visibly shaking, “’Mudblood’?”
“Think of the most vile curses you could come up with in America, roll them all into one and you have it,” Tonks said in a clipped voice as she glared at the worried-looking blonde boy.
"Does it have a literal meaning?" Xander asked conversationally, his voice colder than ice. Some of the muggleborns present were actually able to come up with a better analogy than that: liquid nitrogen.
Tonks nodded, “Yes, there is, at least as far as purebloods are concerned.”
Xander nodded and then looked at Malfoy, who wasn’t looking as cocky as he had earlier, “Tell me, Mr. Malfoy, what would you do if I called you an elitist bigot whose people are dying because of their own stupidity?”
The pale blonde boy colored in anger, “We are NOT dying! The purebloods still hold power in the wizarding world.”
Xander didn’t flinch at the outburst and replied, rather coolly, “But for how long?” Before Malfoy could answer, though, Xander went on, "And compared to the muggle world, cities with millions of people and towers of glass and stone built a hundred stories tall... or weapons that can destroy them in the blink of an eye... just how relevant is the wizarding world?"
The question caused the temperature in the room to drop by several degrees as the students all went deathly silent.
Harry Potter and The Muggle Who Lived, Chapter 3