EXAMPLES FROM THE WEB FOR DOUGHBOY
This story was from the lips of a doughboy whose home was in Philadelphia.
But if a doughboy could not or would not pay, no questions were asked.
"Yes, sir, we certainly did see some aeroplanes," said a doughboy.
The doughboy was afraid it was going to be some more nurses and doctors.
I was in a base hospital one day when a doughboy came in all gory about the head.
Many of them were singing the national anthem of the doughboy, Hail!
The amazing part of the "show," however, was the American doughboy.
Jimmie strolled in, and there was a doughboy with whom he had had some chat on the transport.
I'd rather be a "doughboy" though—anything but an artilleryman, for I hate shells and solid shot.
However, he was compelled to leg it at the point of an American bayonet in the hands of an American doughboy.
"U.S. soldier," 1864, American English, said to have been in oral use from 1854, or from the Mexican-American War (1847), it is perhaps from resemblance of big buttons on old uniforms to a sort of biscuit of that name (1680s), but there are various other conjectures.