moo-moo
Thick smoke, steam, or dust billowing and filling the air so densely you can hardly see through it.
💡A fire scene or a dusty demolition site — 'Smoke was hanging moo-moo over the building.'
工場の煙突からもうもうと煙が上がっている。
Smoke is billowing thickly from the factory chimney.
Smoke was billowing ___ from the burning building.
火事の現場から煙が○○と立ち込めていた。