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Let your hair down
For instance: “It’s Saturday night, you can let your hair down!”
This expression is more often used as advice to tell someone to rest or relax.
Paint the town (red)
“Let’s go out and paint the town red!” The “red” in the phrase is optional. Today, the term is more common without it
Would you like to go out and have fun, or do something exciting?
The “red” in the phrase is optional. Today, the term is more common without it
Have the time of your life
For example: “My son had the time of his life at Disney World.”
Literally, this phrase means “the moment of your life”. The idiomatic meaning is similar: to have a lot of fun, or to have the best day of your life
something is all fun and games
Example – Being a race car driver isn’t all fun and games, it is very easy to have an accident and get injured.
If something is all fun and games, it is very enjoyable at not at all serious. This is often used in negative sentences.
With bells on
For example: “Is it your birthday party? I’ll be there with bells on!”
Are you going to a party? Go “with bells on.” In other words, go with enthusiasm, ready to have fun.
To have a ball
Example – We had a ball at the party last night.
To have a ball is to have a lot of fun doing something. This is one of the most commonly used idioms about fun.
Take it easy
For example: “Hey, take it easy, you can’t work 12 hours a day, every day.”
This expression is commonly used as a suggestion or request, to ask someone to relax or calm down.
To have a whale
Example – We had a whale of a time camping in the mountains.
To have a whale of a time is to have a great time.
Have a ball / have a blast
“The party was great, I had a blast!”
These two expressions have the same meaning: to really enjoy something and have fun
To live it up
Example – They stayed in a 5-star resort on their holiday and really lived it up.
To live it up is to have a very good time by doing exciting or enjoyable things, or by spending lots of money.