warning

• Make no mistake

  This phrase is used to emphasize a statement, indicating that what follows is absolutely true and should not be misunderstood or doubted.

• Watch your back

  To be extremely careful of potential danger, betrayal, or an attack from someone who might try to harm you unexpectedly.

• A cloud on the horizon

  A sign of impending trouble or a future problem that threatens an otherwise good situation.

• Beware of Greeks bearing gifts

  This phrase serves as a warning not to trust enemies who offer something seemingly generous, as their intentions may be deceitful and conceal a trap.

• Voice crying in the wilderness

  A person or idea that expresses a message or warning that is largely unheeded or ignored by the majority.

• Don't Google that

  A warning to avoid searching for a particular topic online, implying the results are likely to be disturbing, inappropriate, or unpleasant.

• Behind you

  A direct warning or an announcement indicating the presence of something or someone approaching or located at one's rear.

• A red flag

  A warning sign or indicator of a potential problem, danger, or issue.

• A dark cloud on the horizon

  This idiom refers to a sign or indication of future trouble, difficulty, or danger that is approaching.

• A wake-up call

  Something that serves as an alarming signal or warning, often prompting someone to take action or realize a serious situation.

• Putting someone on notice

  To formally warn someone about an unsatisfactory situation, their conduct, or an impending action that will affect them.

• Trouble on the horizon

  A warning that problems or difficulties are approaching in the near future.

• Dark clouds on the horizon

  This phrase describes an impending problem or difficult situation that is beginning to appear or is expected soon.

• A reckoning is coming

  This phrase warns that a time is approaching when past actions, especially wrongdoings, will have to be accounted for and consequences faced.

• There's trouble afoot

  Something problematic or concerning is currently happening or is about to begin.

• An accident waiting to happen

  This phrase describes a situation, person, or object that is so inherently flawed or risky that a negative event or disaster is highly likely to occur.

• Wake-up call

  An event or situation that serves as a warning or prompts someone to take action or realize a problem.

• Sign of trouble

  An indication or precursor that difficulties or problems are likely to arise.

• Writing on the wall

  An obvious sign or indication that something bad or unpleasant is going to happen in the near future.

• Red flag

  A clear sign or indicator of a problem, danger, or something that should cause concern.