Roxanne Johnson Posted over 1 year ago Open thread: Having grit means living life like a marathon, not a sprint. Share your story of grit, and how it made a difference. Grit is a fine grade abrasive. Over time it polishes down the rough edges of life that can slice or stab or poke. It is why chickens eat it, they do not have teeth. It is why people without grit are sprinters in life. They lack the ability to wear down and smooth out what is sharp and painful.