open something up

1. Lit. to unwrap something; to open something.

• Yes, I want to open my presents up.
• I can't wait to open up my presents.
• Open up this door!

2. Fig. to begin examining or discussing something.

• Do you really want to open it up now?
• Now is the time to open up the question of taxes.

3. Fig. to reveal the possibilities of something; to reveal an opportunity.

• Your letter opened new possibilities up.
• Your comments opened up a whole new train of thought.

4. Fig. to start the use of something, such as land, a building, a business, etc.

• They opened the coastal lands up to resort development.
• We opened up a new store last March.

5. Fig. to make a vehicle go as fast as possible. (As in opening up the throttle.)

• We took the new car out on the highway and opened it up.
• I've never really opened up this truck. I don't know how fast it'll go.

6. to make something less congested.

• They opened the yard up by cutting out a lot of old shrubbery.
• We opened up the room by taking the piano out.

..... http://idioms.thefreedictionary.com/open+up