Place it at the end of a setup where someone is joking, then follow it with the awkward moment sound, or lead into it with the eh eh ehhhh sound when a joke is building too far.
Sobre este som
This is an extremely brief spoken clip built around the line It's not a joke, delivered in a single clipped burst that lasts barely a tenth of a second. The abruptness gives it a deadpan, confrontational edge, turning a simple denial into a sharp correction that lands before anyone can laugh it off. It works as a quick verbal stop sign, firm and dismissive without raising its voice.