What’s OPM, you might ask? Just a bit of startup slang. Other People’s Money. When entrepreneurs implore you to remember OPM, what they’re saying is: when it comes to financing your dream, use only other people’s money. Entrepreneurship is risky, and you want to ensure that the only skin you have in the game is…well, your actual skin. You’ll be dedicating your life to your idea. Let others dedicate the contents of their wallets.