Out of town
Not in one's own town.My father has been out of town a lot this year.
Out of touch with (someone or something)
No longer in contact with someone.I am out of touch with many of my friends from high school.
Out of this world
Wonderful, fantastic.The cake at the restaurant is out of this world.
Out of thin air
Out of nothing, from nowhere.The deer jumped out of thin air and onto the road.
Out of the woods
No longer in a dangerous situation or condition.The man's injury is very serious and he is not out of the woods yet.
Out-of-the-way
In a remote or far away location.We went to an out-of-the-way restaurant for dinner.
Out of the running
No longer being considered.The new movie is out of the running for any major awards.
Out of the red
Out of debt.The small company is out of the red after cutting many costs.
Out of the question
Impossible."You have no money so going to Brazil for a holiday is out of the question."
On the hour
Exactly on the hour mark (12:00, 1:00 etc.).My grandmother must take her medicine on the hour.