noun
poking or playing with food using chopsticks
A breach of Japanese table manners; refers to the act of poking, stirring, or picking at food with chopsticks instead of eating properly.
せせり箸は、食事のマナーとして避けるべき行為です。
Poking at your food with chopsticks is a behavior you should avoid as a matter of table manners.
子どもがせせり箸をしないように、親が注意した。
The parent warned the child not to play with their food using chopsticks.
嫌い箸 is a broader term for various chopstick taboos, while せせり箸 specifically refers to poking or playing with food.
From せせる (to poke or pick at) + 箸 (chopsticks). The exact historical derivation is uncertain, but the term is conventionally associated with the described table-manner breach.