Place it right after Malfoy finishes a boast, then follow it with the Bruh Meme for a reaction, or open with It Was At This Moment He Knew before the confrontation for extra build-up.
About this sound
This is a short spoken line in which Harry Potter snaps 'Shut up, Malfoy', delivered in a firm, irritated voice that cuts the other boy off mid-sentence. It feels blunt, satisfying and funny, like a perfect put-down for someone who will not stop talking. The line comes from Harry Potter.