IFKYK Meaning: Unlocking the Insider Language of Online Culture IFKYK, an acronym that stands for If You Know You Know, is a popular phrase used in casual conversation, primarily within the realm of social media and online communication. This acronym has gained traction in recent years, especially among the younger generation, and has become a symbol of insider knowledge and shared experiences. Website: https://wordsdictionary.org/ifkyk-meaning/