Thin means very few shares between large leaps in price per share.
Ex 1
If the shares offered were 200,000 @ .007, 150,000 @ .0072, 300,000 @ .0077, 250,000 @ .009, 100,000 @ .011
Ex 2
if the shares offered were 100,000 @ .007, 150,000 @ .0088, 300,000 @ .011
It is 'thinner' in example 2 to hit .011+ from .007 than it is in example 1. Less shares in the way. When it jumps it will really jump in price.
I don't know if this makes sense to you at all, but it does to me in my head. lol.
Only a small amount of shares are in our way and we will be double what we're at now. NXHZ is really 'thin' right now.