Act one’s age
To be mature, not childish
- He was told to stop crying and act his age.
Angry behavior inside an airplane
- Most air rage incidents involve heavy drinking.
Blow one’s stack
To lose one’s temper and explode in anger
- My father will blow his stack when he sees what happened to the car.
Chuck a wobbly
To act in an emotional way
- John chuck a wobbly at work after the boss criticized his report.
Fly off the handle
To become suddenly enraged
- He's extremely irritable - he flies off the handle at the slightest thing.
Draw a blank
Be unable to remember something
- He asked me for my phone number and I drew a blank - I just couldn't remember it.
On the fence
Undecided between two choices
- You can't sit on the fence any longer - you have to decide whose side you're on.
On the ball
Prepared, alert, competent
- I didn't sleep well last night and I'm not really on the ball today.
Off one’s rocker
Crazy, nuts, insane
- You want me to quit my job? You must be off your rocker!