IYKYK (If You Know, You Know) signals that something's value or significance isn't obvious to outsiders—only those with relevant knowledge understand. The phrase celebrates insider status without gatekeeping through explicit explanation. In streetwear, IYKYK applies to subtle pieces (no loud branding but highly coveted), obscure references (graphics meaningful only to those who know the source), or community in-jokes. Wearing IYKYK pieces signals taste beyond hype-chasing: you're not seeking general validation, just recognition from those who matter. The phrase acknowledges streetwear's layered knowledge—some things require context to appreciate. Using IYKYK can be genuine celebration of insider culture or slightly pretentious gatekeeping depending on tone. The term reflects tension between streetwear's inclusive community ethos and exclusive insider knowledge. True IYKYK doesn't need to announce itself; stating IYKYK sometimes undermines the point.