For the similar looking hair implement, please see hairstick.
A chopstick was a utensil used for eating on Earth.
T'Pol had trouble eating with chopsticks. On one occasion, Captain Jonathan Archer told Commander Tucker about T'Pol's "latest bout with chopsticks", to which Tucker complained that he had missed "dinner and a show". (ENT: "Silent Enemy")
In 2369, Keiko O'Brien and her husband Miles ate their supper with chopsticks on the day Keiko told Miles that Deep Space 9 needed a school. (DS9: "A Man Alone")
Later that year, Grand Nagus Zek, Quark, Krax, Rom, and Maihar'du used chopsticks to eat their tube grubs. (DS9: "The Nagus")
In 2370, Jean-Luc Picard used chopsticks to eat a meal of sushi in his quarters aboard the USS Enterprise-D. (TNG: "The Pegasus")
In 2375, the sixth Weyoun clone used chopsticks to eat aboard the USS Rio Grande after defecting to the Federation. (DS9: "Treachery, Faith and the Great River")