noun, noun or participle which takes 'suru', transitive verb
shaving against the grain; shaving upwards
Refers to shaving in the opposite direction of hair growth, which can cause irritation or ingrown hairs.
逆剃りすると肌が荒れることがある。
Shaving against the grain can sometimes irritate your skin.
彼は毎朝逆剃りをしている。
He shaves against the grain every morning.