using one's own chopsticks to take food from a shared dish
Often considered a breach of etiquette; the proper way is to use 取り箸 (serving chopsticks).
See also: 取り箸
Using your own chopsticks to take food from a shared dish is often considered bad manners.
Let's avoid taking food with our own chopsticks instead of using serving chopsticks.
Compound of 直 (じか, direct) and 箸 (はし, chopsticks), with rendaku voicing はし→ばし.