money

(idiomatic) to economize; to spend money carefully (literally: "to watch the money")

time is money

money does not smell

(figuratively) to be rolling in money, to be rolling in it, to be minting it (to be extremely well-off financially)

for a high price, dearly

(idiomatic) to be rolling in dough

(idiomatic) to throw good money after bad

I have no money

(idiomatic, formal) to throw money away