What is rendering, feeling and creamy in photo means?

I have a grp of friends uses Leica Range Finder cameras and they always used terms like the pic will give a nice “rendering”, “feeling” and “creamy”. I have not heard that before in my 20 yrs of photography or perhaps I'm missing it all this while. They said rendering defers from tonality and they just can't put it in words. You have to see it to understand it. Well, all I know is dynamic range and tonality. Could i assume rightfully “rendering” is to sketches/drawing and “tonality” is to photography but these friends of mine just use "rendering" as though its exclusively to Leica image? How about "feelings"? Isn't it we should say good/bad "composition"? And certain Leica lens will churn out image with creamy tone and that takes the cake.

I have nothing against people using such words, but please help me to understand these terms, if it ever use.

David