Meaning of the word "rolling in money" in English

What does "rolling in money" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

rolling in money

US /ˈroʊlɪŋ ɪn ˈmʌni/
UK /ˈrəʊlɪŋ ɪn ˈmʌni/

Idiom

having a lot of money; very rich

Example:
After winning the lottery, they were suddenly rolling in money.
He acts like he's rolling in money, but I know he's struggling.