Place it as the final reaction after the reveal, not under the build-up. Follow a failed attempt with the Bruh Soundboard Button first, then let this clip close the scene, or swap that order and end on Emotional Damage Sound Button for a bigger pile-on.
About this sound
This is a short voice clip of about four seconds built around the Portuguese line 'que coisa horrorosa', delivered as an exaggerated reaction. It gives a listener a mix of shock and disgust played for comedy, like someone cannot believe how bad what they are seeing is, which makes the horror feel theatrical rather than genuinely upsetting.