After the captain presented the foul bill of health, the port authorities quarantined the ship and refused to allow any crew ashore.

She was determined to win the election by fair means or foul.

The pilot warned that if we hugged the sandbanks, we would make foul water and risk slowing the ship as the keel stirred up the mud.

The CEO eliminated unnecessary committees in one foul swoop, streamlining decision-making across the company.

Despite repeated tests, the family kept receiving foul bills of health from various doctors, which made insurance claims difficult.

Fouling one's own nest by revealing internal secrets, the manager damaged the company's reputation.

When one acts corruptly, one fouls one's own nest, and the damage is long-lasting.

Those who destroy local ecosystems foul one's own nest.

When he leaked the company's secrets, everyone said it's an ill bird that fouls its own nest.