The line comes from It's Always Sunny in Philadelphia, the FX comedy that premiered in 2005 and built a long run around the selfish owners of Paddy's Pub. Dennis Reynolds, played by Glenn Howerton, is the group's vain, image-obsessed member, so even a brief reaction from him carries that judgmental tone. Short Dennis clips circulate widely as reaction sounds because his delivery can sum up disgust without any context, and this two-second cut keeps being reused in edits, streams, and group chats.