BloodTrail is a Twitch emote featuring the character Meat Boy from the indie video game Super Meat Boy. The emote shows Meat Boy with a wide, mischievous grin, often interpreted as a sign of lurking, stalking, or following someone in a playful or slightly creepy way. It is commonly used to represent someone or something sneaking up or trailing behind, especially in a humorous or ironic context.
The BloodTrail emote originated from the game Super Meat Boy, which was released in 2010. The emote itself was added to Twitch as a global emote in 2015. It does not originate from a specific streamer but rather from the popularity of the game and its main character, Meat Boy. The emote's name and design play on the idea of Meat Boy leaving a trail of blood as he moves, which is a visual element in the game.