Gains goblins. Those things in your life that rob you of what otherwise would be your hard-earned gains on strength, muscle size, endurance or whatever other thing you want to develop by training.
It can be anything: a person (like that gym bro that maybe distracts you more than it's good for you), a medical condition, a commitment, or what is usually most common (and be honest here, because for most people it is one in this category), a bad habit of yours, amongst others.
Feel free to share.
Both my airbuds and phone are Chinese already and they are both malfunctioning terribly despite the fact that I have only had them for 2 years at most. I guess one day I'll just have to renew my electronics and compensate the expense with soups for dinner for a few weeks.