The Mocking SpongeBob meme, popularly known as "SpongeBob Chicken," originated from the 2012 SpongeBob SquarePants episode titled "Little Yellow Book." In the scene, SpongeBob behaves like a chicken whenever he sees plaid. The image became a viral sensation in May 2017 when users began pairing the still with alternating uppercase and lowercase text to represent a mocking or sarcastic tone. It is widely used across social media to repeat a statement back to someone in a condescending way, making it one of the most recognizable reaction memes in existence.