The 'We're Costco Guys' meme originated from a viral TikTok series by the father-son duo A.J. and Big Justice, who gained massive popularity for their high-energy trips to the warehouse giant. The format typically begins with the pair declaring their identity followed by 'of course' statements regarding their shopping habits, famously highlighting the Chicken Bake and the Double Chunk Chocolate Chip Cookie. Known for their signature 'Boom!' catchphrase, the duo's wholesome and enthusiastic content quickly turned into a versatile template. Users now use the format to parody specific lifestyles or communities, following the 'We're X, of course we Y' structure to humorously point out common traits or stereotypes.