another day, another dollar A resigned way to say each day brings the same routine work and small pay; just getting through the day.
any port in a storm In a difficult situation, any available option—even if not ideal—will do as a temporary solution.
as the crow flies By the shortest, straight-line distance between two points (not following roads or routes).
as thick as thieves Very close friends; strongly bonded and often sharing secrets or always together.
as tough as nails Very tough, resilient, or hard to hurt/impress; can also mean physically strong or emotionally hard.
at a crossroads At an important turning point where a decision must be made between different options or directions.
at death’s door Extremely ill or close to dying; sometimes used more loosely for being near collapse or failure.
at the drop of a hat Immediately; without hesitation or delay, often in response to a sudden request or opportunity.
at the end of the day Ultimately; when everything is considered, the final or most important point is.
at the top of your lungs As loudly as you can; with maximum volume (e.g., shouting or singing very loudly).
at your wit's end So worried, frustrated, or exhausted that you can’t think of what to do next; out of ideas.
avoid like the plague To stay away from someone or something as much as possible because it’s unpleasant, risky, or strongly disliked.
away with the fairies Absent-minded or distracted; not paying attention to what’s happening, often as if daydreaming or living in a fantasy.
back against the wall In a difficult situation with few or no options left; under strong pressure, forced to act.
back in the saddle To resume an activity or role after a break, setback, or failure; to regain confidence and momentum.
back to square one Back at the beginning after a failed attempt or setback, needing to start over from the start.
back to the drawing board To start over with a new plan after a failure or setback, rethinking the approach from the beginning.
back to the wall In a very difficult situation with little room to maneuver; forced to act or make a tough choice.
backseat driver Someone who gives unwanted advice or directions, especially to the person actually in control (often while riding in a car).
bad apple A person in a group who is dishonest or harmful and can cause trouble or spoil others’ reputation.
bad blood Long-standing hostility or resentment between people or groups because of past conflict or wrongdoing.
bad hair day A day when your hair looks especially messy or unattractive; often also means you’re having a rough, frustrating day overall.
bad to the bone Very tough, rebellious, or mean—bad in an intimidating “to the core” way (often admiring or playful).
bail out To rescue someone from trouble (often financial or legal), or to leave an aircraft by parachute; also to remove water from a boat.
ballpark figure A rough numerical estimate or approximate cost/amount, not a precise or final number.
bang for your buck Good value for the money spent; a strong result or benefit compared with the cost.
bark up the wrong tree To make a wrong assumption about who is responsible or what the cause is, and pursue the wrong person or idea.