Gambling using a loan money is a big NO. The thing about using loan money for gambling is when you lose, you lose twice. It just doubles your regret, doubles the guilt, and doubles the money you lost. In the worst case, you will be possibly get into debt and that is something that we want to avoid. When I'm engaging to gambling I always tell myself to only risk something what I can afford to lose, in this way I am always reminded to not exceed my preferred amount for gambling. So, only gamble using your free money, but if you do not have any, better not to engage at all.