Make/lose money hand over fist
Definition 1 of 1
Pro Tip 1/3Figurative Meaning
Understand this phrase is an exaggeration and isn't about physical movement or hands. 
Since the product launch, we're making money hand over fist!
Pro Tip 2/3Colloquial Use
It's common in casual conversation, not formal writing. 
Ever since joining that business, he’s been losing money hand over fist.
Pro Tip 3/3Emotional Connotation
Often shows excitement or concern about the financial change. 
Their startup began making money hand over fist, and they were thrilled.