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Jyutping seoi1 sap6 jat1
Pinyin shuāi shí yī

Definitions (CC-CANTO)
  1. having sexual intercourse with minor (slang)
Definitions (粵典–words.hk)
  1. 動詞、俚語
    同​十六​歲​以下​女童​發​生性​行為​,​因而​觸犯​香港​法例
    to commit statutory rape; i.e. to have sexual intercourse with a girl under 16
    • 呢個老師衰十一,下世都唔使再做。
      呢个老师衰十一,下世都唔使再做。
      ni1 go3 lou5 si1 seoi1 sap6 jat1, haa6 sai3 dou1 m4 sai2 zoi3 zou6.
      This teacher is charged with statutory rape. He is not going to be a teacher any more.
Definitions (Wiktionary)
  1. verb, Cantonese, Hong-Kong, colloquial, of a man
    to commit statutory rape; to have unlawful sexual intercourse with a girl under the age of consent (i.e. 16 in Hong Kong)
Examples (粵典–words.hk)
  1. Cantonese
    呢个老师衰十一,下世都唔使再做。
    呢個老師衰十一,下世都唔使再做。
    ni1 go3 lou5 si1 seoi1 sap6 jat1, haa6 sai3 dou1 m4 sai2 zoi3 zou6.
    • This teacher is charged with statutory rape. He is not going to be a teacher any more.
Examples (Wiktionary)
  1. Cantonese
    衰十一、衰贩毒
    衰十一、衰贩毒
    seoi1 sap6 jat1, seoi1 faan3 duk6
    • got arrested for sex with minor/drug trafficking