That's one of the new phrases that pays.
It simply means keep it 100%,giving it your all,going all out for your goal!
We need to keep it hundred in every area of your life. If you're going to do it,do it 100%,not 85%,50% but 100%
Why do something halfway?
If you're going to do it,make it awesome,over the top,extraordinary,and yes keep it Hundred!!!
Keep It Hundred!!!