pound out
pound out {v. phr.}
1. To play a piece of music very loudly on a percussion instrument.
The boy was pounding out the tune "Mary had a little lamb" on the marimba.
2. To flatten something with a hammer.
The bodyshop uses special hammers to pound out the indentations in the bodies of cars.
3. To produce a piece of writing on a typewriter in haste and without much care.
She hurriedly pounded out a letter of recommendation for the foreign graduate student.
Categories:
Source: A Dictionary of American Idioms