"You are a Malfoy" Albus said in a childish and accusatory tone, "my uncle/dad/mum/whatever say all the Malfoys are bad"
"Well, better be bad than munchkins like your parents" Scorpius replied with a disdainful look.
"What?" Albus exclamed.
"Oh! I beg your pardon, how very unpolite of me, to use such a rude word... " Scorpious said, a sweetly mocking smile on his lips. "What I wanted to say is, better bad than vertically challenged" And with these words, he turned around and went to look for compartment to sit comfortably, leaving an open-mouthed Albus behind him.