“I don't want to make a big deal out of it.”
You ordered a medium rare steak at a restaurant, but when it came the steak was overcooked. Your friend says that you should complain to the waiter. You say this because you don't like to confront people directly.
I don't want to make a big deal out of it.
When you say that something "is a big deal", it means that it's important. But when you "make a big deal out of ___", it means that something is not that important but you're acting like it is. You can use this phrase is situations such as:
- When a family member is planning a big party for your birthday, even though you don't care about it.
- When someone is getting angry about something that you think is just a small mistake.
- When you lend someone some money and they thank you too much.
The phrase "make a big deal out of something" is used in casual speech.