FSE

FSE is a slang exaggeration often seen in texts and online conversations, used when people find something exceptionally funny. It's the digital equivalent of laughing so hard you can't breathe, though most users employ it with a dose of hyperbole.

People that use "FSE" typically employ colorful language to express their emotions (like WTF, FAF, or LLS), and they often use it in informal settings like text messages, chat apps, or social media platforms. For example, they may use FSE when bantering with friends or sharing a meme on X (formerly Twitter) or Reddit.