食洋腸 [－－肠]

Jyutping sik6 joeng4 coeng4
Pinyin shí yáng cháng

Definitions (Wiktionary)
  1. verb, Cantonese, derogatory, figuratively, verb-object
    to have sex with a Caucasian man
    (syn.) 吃洋腸, 吃洋肠

食洋腸 [－－肠]

Jyutping sik6 joeng4 coeng2
Pinyin shí yáng cháng

Definitions (CC-CANTO)
  1. describes a non-western girl who goes out with a western guy [colloquial]
Definitions (粵典–words.hk)
  1. 動詞、黃賭毒
    指華人​女性​同​西洋​男性​ ​（​特指​白人​）​發​生性​關​係
    (said of an "ethnically" Chinese girl) to go out with a Western man (particularly a Caucasian); literally: to eat Western sausage
Examples (粵典–words.hk)
  1. Cantonese
    你就好啦，可以去外国食洋肠，正呀！
    你就好啦，可以去外國食洋腸，正呀！
    • Must be great to meet the white men .