hammer up
Intermediate (B1)neutral
To fix something to a wall or surface by hammering nails into it.
"They hammered up a 'For Sale' sign in the front garden."
Hear it in context
The Incredibly Unique Triple Barreled Pistol... - Smarter Every Day 304
SmarterEveryDay · 6:02
And then once the powder goes, it blows the hammer up.
What Makes the Piano so Amazing? Let's Break it Down!
Rick Steves' Europe · 3:43
and that throws the hammer up here to make the string ring.
The Incredibly Unique Triple Barreled Pistol... - Smarter Every Day 304
SmarterEveryDay · 5:33
ignites] [D] As soon as it hits, look, the cap blows the hammer up.
What Makes the Piano so Amazing? Let's Break it Down!
Rick Steves' Europe · 2:39
mechanism that when you hit the key, it would throw the hammer up to the string