The phrase "silky smooth" means something that is very smooth and soft, like the texture of silk fabric. It describes something that is pleasant and comfortable to touch or experience. Full definition
Even the most demanding games are no match for this, with silky smooth frame rates no matter what I was playing. (stuff.tv)
The gameplay feels silky smooth at 60 fps, and the idea of working as a team to hold down power points on the map is rather appealing. (shortpause.com)
I still love this aloe though because it has the perfect thick silky smooth texture for a body moisturizer. (amazon.com)