The idiom "sick and tired of" means that you are extremely frustrated or annoyed with something, and you have had enough of it. You use this idiom when you are expressing your strong feelings of displeasure or dissatisfaction towards a situation, person, or thing that has been bothering you for a long time.
For example, if you have been working overtime for weeks, and you are exhausted and fed up with it, you can say, "I am sick and tired of working overtime." Or if you have a friend who always cancels plans at the last minute, you can say, "I am sick and tired of her always canceling plans."
In short, "sick and tired of" is a common expression used to convey a strong sense of frustration or annoyance towards something that has been going on for too long, and you want it to stop.
• She is sick and tired of the constant negativity in the news.
• He is sick and tired of his boss micromanaging every project.
• She is sick and tired of her roommates leaving dirty dishes in the sink.
• I am sick and tired of always being late for work.
• We are sick and tired of the government's lack of action on climate change.
• They are sick and tired of dealing with the bureaucracy and red tape of the legal system.