The phrase "When the fajitas come out sizzlin'" is a popular meme catchphrase that captures the experience of fajitas being served on a hot skillet, making a sizzling sound that is both distracting and apetizing at restaurants. This sizzling presentation is a hallmark of fajitas, typically served on a cast- iron skillet, keeping the meat hot and adding to the sensory appeal with its sound and visual effect. The meme became widely known beginning from around 2018 and has grown popular continuously, with various versions circulating on social media, celebrating the moment fajitas come out of the kitchen still sizzling hot and fresh.

In terms of the actual dish, fajitas traditionally come out sizzling because they are served on a hot cast-iron skillet or plate that has been heated before the meat and vegetables are placed on it, so that they continue to sizzle when brought to the table. This sizzling effect is intentional and one of the reasons fajitas are enjoyed as a lively dining experience.

So, fajitas "come out sizzlin'" in the moment they are served hot on a heated skillet, which is the instant the sizzling sound is most prominent and enjoyed by diners.