last straw

bang straw

A farmer's servant, especially a thresher.

breathe one's last

To die.

buy straw hats in winter

Of stocks, to buy when both demand and price are low, so as to sell when demand and price are high.

cobbler, keep to your last

One should not criticise matters outside one's field of expertise; one should mind one's business.

dead last

Finishing in last place in a competition or ranking, often by a considerable margin to the next to last place finisher or after an exceptionally poor showing or season.

draw one's last breath

To die.

draw the short straw

To be selected to do an undesirable task (by drawing the shortest straw or otherwise).

every last

every; without exception (used for emphasis).