noun
licking one's chopsticks
A specific breach of Japanese table manners; considered rude and unhygienic.
ねぶり箸は、食事のマナーとして避けるべき行為だ。
Licking your chopsticks is an act to avoid as part of dining etiquette.
嫌い箸 is a general term for various improper chopstick uses, while ねぶり箸 specifically refers to licking chopsticks.
Compound of ねぶり (continuative form of ねぶる, 'to lick') and 箸 (はし, 'chopsticks'). The reading ねぶりばし results from rendaku.