The terms 'cap' and 'no cap' originated in African American Vernacular English (AAVE), specifically within the Atlanta hip-hop scene, before becoming global internet slang. To 'cap' is to lie or exaggerate, while 'no cap' signifies that someone is being completely honest. In the world of memes, the blue baseball cap emoji is the universal symbol for calling out a lie. These memes are frequently used to react to unbelievable social media posts, humorous personal failures, or to mock someone who is clearly being dishonest about their lifestyle or accomplishments.