pocket

have deep pockets have large financial resources. informal

2014New Zealand Herald Going into a highly competitive market and competing with the big boys with deep pockets is a challenge.

in pocket

1 having enough money or money to spare; having gained in a transaction.

2 (of money) gained by someone from a transaction.

in someone's pocket dependent on someone financially and therefore under their influence.

line your pocket: seeline.

live in someone's pocket live very close to someone and be closely involved with them.

out of pocket having lost money in a transaction.

pay out of pocket pay for something with your own money. US

piss in someone's pocket: seepiss.

put your hand in your pocket spend or provide your own money.