si6 fei1 gan1是非根
Jyutpingsi6 fei1 gan1
Yalesih fēi gān
Definition
The male genitals.
slangbodyslang
How it's used
Refers specifically to male genitalia in a vulgar or derogatory context. It is rarely used to describe the anatomy itself, but rather functions as a crude way to dismiss someone's speech as lewd, inappropriate, or purely focused on sexual topics. The term carries a strong sense of disdain for the speaker's lack of decorum.
Examples
He is always talking about dirty stuff, so annoying.
Related words
Common phrases
to talk dirty or lewdly
Common mistake
Do not confuse this with the common phrase 講是非, which means to gossip or stir up trouble. While they share the character 是非, the addition of 根 changes the meaning entirely to a vulgar anatomical reference.
Grammar color guide
Noun
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Adjective
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Grammar guides
- Aspect markersCantonese has no tenses, but it does have aspect markers. Learn how zo2, gwo3, gan2, and hai2 dou6 show completion, experience, and ongoing action.
- In 30 secondsThe whole language at a glance. No tenses, no plurals, six tones, sentence particles. Read this before you dive into any specific topic.
- ParticlesSentence particles add tone, emotion, and nuance. Learn the most common particles in Cantonese and how to use them.



