bottom dollar

a day late and a dollar short

Too late and too feeble to achieve the desired effect.

almighty dollar

The dollar, satirically characterized as a god.

bet one's bottom dollar

To be absolutely sure of something; to be certain enough of something to wager everything.

bottom fishing

Buying, or seeking opportunities to buy, investment securities or other valuable properties at a time when markets are depressed and prices are low.

bottom line

The summary or result; the most important information.

bottom of the line

The worst or lowest quality on the market, especially among a range of products.

bottom of the ninth

By extension, any last chance or final opportunity.

bottom out

Of a vehicle, to touch or drag along the ground or other surface.