粵典 (words.hk)香港詞
空間細到好似#棺材 咁嘅單人房（量詞：間） (coffin room; coffin cubicle)
名詞用例
我邊租得起成間單位吖？瞓棺材房咋。
ngo5 bin1 zou1 dak1 hei2 seng4 gaan1 daan1 wai2 aa1? fan3 gun1 coi4 fong2 zaa3.
I can't afford the rent of a whole flat at all. I just live ("sleep" literally) in a coffin cubicle.