deep pockets

noun[usually plural]3

1. •
   Pockets long enough inside to accommodate more than the average number or size of contents.

   • I like the deep pockets on these pants because my cellphone doesn't fall out when I run with my dog.
   • It was a good thing his coat had deep pockets because he has big hands and it was quite cold that day.
2. •
   (figurative) An ample supply of money, especially money which one is willing to spend.

   • We need an investor with deep pockets to help us get our invention to market.
3. •
   (figurative) The possessor of such money.