The phrase is a play on the common Spanish saying hace calor o soy yo, given a Rioplatense twist by pronouncing yo as sho. Online it is linked to El Bananero, the long running Spanish language internet comedy character known for short catchphrases that fans clip and reuse as audios. The line spread less as a full video quote and more as a repeatable reaction, shared in chats and edits whenever someone wants a cocky, summery response without explaining the joke any further at all.