It's just about ANYTHING besides knowing Christ, according to the Apostle Paul. Check out what he wrote to the people of Philippi:
"The very credentials these people are waving around as something special, I'm tearing up and throwing out with the trash—along with everything else I used to take credit for. And why? Because of Christ. Yes, all the things I once thought were so important are gone from my life. Compared to the high privilege of knowing Christ Jesus as my Master, firsthand, everything I once thought I had going for me is insignificant—dog dung. I've dumped it all in the trash so that I could embrace Christ and be embraced by him. I didn't want some petty, inferior brand of righteousness that comes from keeping a list of rules when I could get the robust kind that comes from trusting Christ—God's righteousness." Philippians 3.7
Hmmm. Just about covers it, doesn't it? Perhaps it should be more accurately called "god" poop (anything we let take the place of Christ in our lives).
So....... what in the world are you holding on to other than knowing Christ? Hold a pile of "god" poop in your hands. Smells, doesn't it?