mou5 gwai2 jung6冇鬼用

Jyutpingmou5 gwai2 jung6

Yalemóuh gwái yuhng

Definition

Completely useless; of absolutely no use.

colloquialdescriptionsslang

How it's used

Adding 鬼 to an adjective or verb acts as an intensifier that conveys frustration, annoyance, or a dismissive attitude. It functions similarly to adding "damn" or "bloody" in English to emphasize the negative quality of the subject. While common in casual speech, avoid using it in professional or formal settings as it can sound aggressive or rude.

Examples

le1呢bou6部gei1機waai6壞zo2咗，zan1真hai6係mou5冇gwai2鬼jung6用。

This machine is broken, it is really useless.

nei5你maai5買ni1呢di1啲je5嘢faan1返lai4嚟，hai6係mai6咪mou5冇gwai2鬼jung6用㗎？

Are these things you bought useless?

Common phrases

zan1真hai6係mou5冇gwai2鬼jung6用

really useless

jyun4完cyun4全mou5冇gwai2鬼jung6用

completely useless

Common mistake

Learners often mistake this for a literal reference to ghosts, but it is purely an intensifier. Do not use it to describe people in a professional context unless you intend to be insulting.