BLOW UP

1. To blow up something (or blow something up) means to fill it with air; for example, a balloon, or a car or bicycle tyre.

Example of use:

Can you blow these balloons up for the party, please?

1. Blow up also means to suddenly lose your temper (get very angry).

Informal English.

Example of use:

1. I broke her iPad and she blew up at me.
2. We were having a discussion about the accounts and he suddenly blew up and stormed out.

3. When something blows up (or when somebody blows something up) it explodes. Examples of use:

1. The family were injured when their house blew up because of a gas leak.
2. Fortunately the plane was empty when the hijackers blew it up.