Meaning
A grinning face with thick glasses and prominent front teeth, the cartoon image of a bookworm. Literally it represents a nerd or geek.
People use it to own their love of science, coding, games or studying. Online it also appears in the “um, actually” meme to mock someone who over-corrects others, so context matters. Pair with 📚 or 💻. Example: “Spent all Saturday building my own keyboard 🤓”.