Green’s Dictionary of Slang

chopstick n.¹

(A us./US black) a derog. term for an East Asian person, esp. Chinese.

1832		Launceston Advertiser (Tas.) 11 Apr. 119/2: [A] chop-stick, who came to my lodging to talk to me about the mode of harvesting and preserving the corn.
1852		Maitland Mercury (NSW) 13 Mar. 4/3: Every horse you possess having no action, or which a day's journey would knock up, (to be found in lots far more numerous than the Chinamen as yet,) ought to be turned out to fatten; when plump, take the animal into the nearest station, occupied by these chopsticks.
1880		G.F. Northall ‘Momus’ Misc. 76: You’d ne’er a finer pigtail see / Than that of Chopstick Chickoree [...] Whenever Chopstick walked along / The folks would follow in a throng.
1913		implied below.
1980		E. Folb Runnin’ Down Some Lines 232: chopstick Asian person.
2013		A. Martinez Falling in Love 50: ‘How cool is that, Chong? Wolverine is in the house.’ ‘Wolver this, you chopstick’.

In compounds

Chopstick-land (n.)

China.

1870		Wkly Arizona Miner (Prescott, AZ) 22 Jan. 3/4: F. F. Low, our new Minister to Chopstickland (China), has started for his post.
1913		Day Book (Chicago) 1 Aug. 31/1: It is the utter opposite of Chinese drama. In the chopstick-land a play lasts for three whole days.
1927		H.P. Eames ‘Fiddles, Flutes, and Drums’ in Child Life (NY) Aug. 470/2: In ‘Music in Chopstick Land’ I wrote about Chinese music but I forgot to tell you that the Chinese have a very clever way of bowing their fiddles.

SE in sl. use

In phrases

chopstick legs (n.)

very thin legs.

1976		E. Elias Profile of Glindy 96: For if ever a little fellow tried to overcome his handicapped back and chopstick-legs, for three long weeks, the ‘Little Boy of Brongest’ [a dog] certainly did.
2005		C. Marsden Moon Runner 21: Ü5 Don't worry - you'll do fine. You've got those long, chopstick legs,’ he said to Mina.