godan verb (-ru), transitive verb
pick at; poke at; pick (teeth)
Describes poking, prodding, or picking at something with a thin tool or fingers, often in a fiddling or cleaning manner. Common with chopsticks or toothpicks.
彼は箸で料理をせせりながら話していた。
He was talking while picking at the food with his chopsticks.
食後に楊枝で歯をせせる。
After meals, I pick my teeth with a toothpick.