To purchase a property as in investment, and to let it out for rental instead of living in it
eat one's seed corn
To consume what is meant for investment instead.
buy straw hats in winter
Of stocks, to buy when both demand and price are low, so as to sell wh…
buy the farm
To die; generally, to die in battle or in a plane crash.
buy out
to purchase the entire stock or extent of something
buy it
To believe any particular assertion or idea; to support it.
buy time
To purposefully cause a delay, in order to achieve something else.