blast up
C1 informal separable both
In simple words
To suddenly make something much louder, OR to shoot up very fast.
Literal meaning: To blast (explode or project) in an upward direction.
Meanings
1 B2 informal
To increase the volume of sound to a very high level suddenly.
"He blasted the radio up as soon as his favourite song came on."
Grammar: separable
2 C1 neutral
To rise or move upward suddenly and with great force.
"Flames blasted up through the vent when the engineers opened the pressure valve."
Grammar: inseparable
Usage notes
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.
Commonly used with
volume music speakers rocket price
Forms
Base
blast up
I/you/we/they
3rd person
blasts up
he/she/it
Past simple
blasted up
yesterday
Past participle
blasted up
have + pp
-ing form
blasting up
continuous
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