IYKYK is used on Internet posts, as well as memes, captions and even within text messages to refer to shared experiences, jokes or trends. An illustration could be that an individual may share a photograph of an inside joke occurrence and write across it: IYKYK. Many of the uses can be very playful or some may be suggestive of some personal affair or secret of the peer group. Parents need to be aware of such contexts in order to be able to have constructive discussions about online communication, peer pressure, and responsible digital behavior with their kids.
Know more: https://radarro.com/iykyk-meaning/