All important
Most important, urgent or necessary. The meeting is all important and I plan to attend it.
All for (someone or something)
To be very much in favor of someone or something. The woman is all for the manager and she never criticizes her.
All ears
To be eager to listen to what somebody has to say. I'm all ears, please tell me about the meeting.
All dressed up
Dressed in one's best clothes. The girls were all dressed up for the evening.
All day long
The whole day. The girl was happy to wait all day long for the mail to arrive.
All at once
Suddenly, without warning. All at once, the fire alarm rang and we had to leave the building.
All along
All the time, throughout. I knew all along that my friend would not get the promotion.
Alive and well
To be well and healthy. The worker was alive and well after the accident.
Alive and kicking
Definitely alive; lively and active. My aunt is ninety years old and she is very much alive and kicking.
Air (something) out
To freshen something by putting it in the open air. We put the blankets outside in order to air them out.