The idiom "to run hot and cold" means to have mixed feelings or to be inconsistent in one's behavior or attitude towards something or someone. It can also refer to being indecisive or uncertain about something.
For example, if someone is interested in a job but then changes their mind and decides not to apply, they are running hot and cold. Similarly, if someone is friendly one day and distant the next, they are also running hot and cold.
This idiom is often used to describe someone's behavior in a relationship, where they may show affection one moment and then withdraw the next. It can also be used to describe someone's attitude towards a particular idea or concept.
Overall, "to run hot and cold" is a way to describe someone who is inconsistent or indecisive in their actions or feelings.
• The reviews for the new restaurant in town have been running hot and cold, some people love it while others hate it.
• Sometimes, my little sister runs hot and cold when she plays with her toys.
• The author's latest book has been running hot and cold amongst critics, some calling it a masterpiece while others find it underwhelming.
• My boss runs hot and cold when it comes to giving feedback on my work.
• My friend's feelings about her new job offer have been running hot and cold the past few days.
• The negotiations between the two countries have been running hot and cold for months, there seems to be no clear resolution in sight.