Question 1

What does "blast up" mean?

Accepted Answer

To increase the volume of sound to a very high level suddenly.

Question 2

How do you use "blast up" in a sentence?

Accepted Answer

He blasted the radio up as soon as his favourite song came on.

Question 3

Is "blast up" formal or informal?

Accepted Answer

"blast up" is informal — used mainly in casual conversation. Not well-established as a fixed phrasal verb; largely informal and context-dependent. 'Blast the volume up' is heard in casual speech, but 'turn up' is far more standard. The sense of something shooting upward explosively is marginal and would typically be replaced by 'blast off' or 'shoot up.' Learners should treat this as rare.

blast up

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