noun
using chopsticks upside down; taking food with the wrong end of chopsticks
A breach of Japanese dining etiquette; refers to using the thicker, hand-held ends of chopsticks to pick up food, which is considered unclean.
逆さ箸はマナー違反です。
Using chopsticks upside down is a breach of etiquette.
子どもが逆さ箸で食べようとしたので、注意した。
My child tried to eat with chopsticks upside down, so I corrected them.