si2 haang1 gwaan1 dou1屎坑關刀屎坑关刀
Jyutpingsi2 haang1 gwaan1 dou1
Yalesí hāang gwāan dōu
Definition
Useless; completely incompetent in both academic and physical pursuits.
slangpeopleslang
How it's used
This idiom relies on the imagery of a sword found in a latrine, implying it is dirty, useless, and essentially a waste of space. It is a harsh, dismissive way to describe someone who lacks proficiency in both intellectual and physical tasks. Because it carries a vulgar connotation due to the reference to a latrine, it should be avoided in professional or formal settings.
Examples
He is absolutely useless at everything he does.
You think you're so great? Actually, you're just incompetent at everything.
Related words
Common phrases
useless at everything
Common mistake
Do not use this to describe a specific task that is difficult; it is strictly used to insult a person's general lack of ability or talent across the board.
Grammar color guide
Noun
Verb
Adjective
Adverb
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Classifier
Particle
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Grammar guides
- TonesCantonese has six tones, and the tones can change in certain grammatical contexts. Learn the six tones and the rules for tone change.
- Time and datesClock time, days of the week, months, and years. The patterns you need to make plans and talk about when things happen.
- Modal verbsHow to say can, will, may, should, must, and want. The core modal verbs of Cantonese and the differences that trip up beginners.



