like nobody's business
US /laɪk ˈnoʊ.bɑ.diz ˈbɪz.nɪs/
UK /laɪk ˈnoʊ.bɑ.diz ˈbɪz.nɪs/

1.
ものすごい勢いで, 非常に, 猛烈に
very much or to a great degree; with great intensity or speed
:
•
He was eating like nobody's business after his long run.
彼は長いランニングの後、ものすごい勢いで食べていた。
•
The new restaurant is making money like nobody's business.
新しいレストランはものすごい勢いで儲かっている。