I remember seeing "hold my beer" t-shirts and the jokes from when I was a kid, well before big sky existed.
Don't confuse trademarks with patents/copyright. Patents/copyrights are for original ideas. Trademarks just reserve a word or phrase for your use as branding - it doesn't need to be original. For example, I could trademark Delaware Brewing Company, Triangle Brewpub, or Idiot Taproom even though I didn't invent Delaware, triangles, or idiots.