literally: airplane olive; licorice olive, a popular Cantonese snack
Definitions (粵典–words.hk)
名詞
即係甘草欖。一九六零、七零年代賣欖嘅人背脊孭住欖型嘅容器周圍叫賣。當時啲樓得幾層，買家從露台掟錢落街畀小販，而小販就丟甘草欖上樓畀顧客，因為動作好似放飛機咁，所以就叫飛機欖。 Licorice Olive, Aeroplane Olive: During the 1960s and the 1970s, hawkers selling licorice olives, carried olive-shaped containers and threw the olives upstairs to the customers. As the action of throwing the olives is similar to that of throwing a paper aeroplane, the licorice olives are also called the aeroplane olive.
你喉嚨痛呀？叫樓下飛兩包飛機欖上嚟啦！
你喉咙痛呀？叫楼下飞两包飞机榄上嚟啦！
nei5 hau4 lung4 tung3 aa4? giu3 lau4 haa6 fei1 loeng5 baau1 fei1 gei1 laam2 soeng5 lai4 laa1! Are you suffering from sore throat? Ask the hawker to throw some aeroplane olives upstairs!