to apply a cosmetic product, such as lipstick or nail varnish, on one's wrist and show the result on video in a blog so that viewers can tell the colour of it
I'll swatch their latest shade.
Submitted by mayo from France on 08/10/2014
Swatch
trademark/swɒtʃ/
a type of fashionable watch with a picture or design on it 斯沃琪手表(一种上面有图案的时尚手表)