Put this clip right after the on-screen proposal or request it is rejecting, then follow it with the Damn Meme Sound Button for the other person's reaction shot. In a reaction stack, place it before a cutaway rather than over dialogue, so the edit moves from request to refusal to response in clear order.
Über diesen Sound
This is a short voice clip built around a speaker delivering the phrase ain't nobody as a flat, dismissive shutdown. It runs just under eight seconds, long enough for the attitude to land rather than flash past. Listeners get a dry, amused feeling, like watching someone instantly reject an idea without needing a longer argument or explanation.