Short, blunt, and timeless. This phrase has lived forever in punk, skate, and general shit-talk culture because it doesn’t need context or explanation. It’s not clever. It’s not subtle. It’s just a universal response that lands every single time. Whether it’s worn ironically, aggressively, or purely for laughs, this slogan sits squarely in the long tradition of DIY humor, low-effort antagonism, and not taking anything too seriously. If you know, you know. Size: 4 x 4 inches Material: Heavy-duty black duck cotton canvas Type: Sew-on patch We are an independent third-party reseller and are not affiliated with, endorsed by, or sponsored by any of the brands we offer. All trademarks and trade names remain the property of their respective owners and are used solely for identification and descriptive purposes.