Waekjeo

"Waekjeo" is a neologism on Twitter referring to aliens or extraterrestrial creatures, often used to describe unique situations or behaviors associated with them. Initially starting as slang symbolizing aliens or alien language, its use expanded after accounts like "Alien Hunting Club (외사모)" gained popularity on Twitter. Over time, "Waekjeo" has evolved to also refer to unexpected or irrational behavior or individuals​.

Derived terms related to "Waekjeo" have also emerged. For instance, Twitter users causing a commotion are called "Wakwaki," and variations like "Wakjjo" have appeared. These derivatives have become part of the slang vocabulary on Twitter, often used to describe peculiar entities, forming a specific humor code among users​.

This term has gained particular traction among the MZ generation, who show high interest in neologisms. Through various interpretations and further transformations, "Waekjeo" continues to be widely used. Recently, it has spread as a humorous term referring to abnormal or nonsensical behavior, often combined with other memes for creative expression​.