The term 'Sauce' is a popular internet slang variation of the word 'source,' primarily used to request the origin of an image, video, or quote. It originated in the mid-2000s on imageboards like 4chan, specifically within the /b/ and anime-centric boards, as a way to bypass word filters or simply to add flavor to community jargon. The meme often features characters looking intensely or Gordon Ramsay screaming about 'Lamb Sauce.' It has become an essential part of internet etiquette, where providing the 'sauce' is seen as a sign of respect and helpfulness within digital communities.