名詞
形容某個人唔聲唔聲、作風低調隱秘，唔知幾時可能會害你，就好似啲狗唔吠之後咬你一啖。出自歇後語「無聲狗咬死人」嘅比擬。 person who remains silent and suddenly gives a serious strike; literally: silent dog. The metonymy comes from the "sandwich pun" 無聲狗咬死人mou4seng1gau2 ngaau5 sei2jan4.