Gung ho
What's the meaning of the phrase 'Gung ho'?
Zealous and eager.
What's the origin of the phrase 'Gung ho'?

"Borrowing an idea from China, Carlson frequently has what he calls 'kung-hou' meetings... Problems are threshed out and orders explained."
The following year Life magazine reported:
"He [Carlson] told them [the Marines] of the motto of the Chinese Co-operatives, Gung Ho. It means Work Together... My motto caught on and they began to call themselves the Gung Ho Battalion."
The first record of gung ho in print was a little earlier. In October 1941, the Oakland Tribune reported a story about some captured short war films. This doesn't mention Carlson or the US Marines by name, but the films relate to their activities:
"Other shorts are 'Information Please' and 'Gung Ho' with Regan McCrary."
See other phrases that were coined in the USA.