blow up (2)
Meaning: to fill with air or gas in order to inflate somethingSynonym: inflate
- blow up sth We're still getting ready for the party, and Carrie's still blowing up balloons.
- blow sth up The football's a bit flat, so if someone's got a bicycle pump we can blow it up a bit more.
blow up (2): balloon, tyre, football, air mattress, inflatable toys, lilo
I'm checking the oil and the spark plugs, and Brad's blowing up