The line comes from the Spanish dub of The Green Mile (1999), where John Coffey, played by Michael Clarke Duncan, quietly tells guard Paul Edgecomb he is tired of the pain he feels from the world. Online the dramatic confession was cut down to just estoy cansado jefe and spread across Spanish speaking social media, videos and chats as a universal burnout joke. The corto version keeps only the phrase, making it easy to reuse, and it remains popular because work and school exhaustion never stops being relatable.