A boy who directed the animals that pulled a plough(noun)
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Use "ploughboy" in a sentence
"'As ignorant as a ploughboy,' is a phrase fallen into disuse."
"Dennis did not mind being called a ploughboy a bit."
"Gas looming through the fog in divers places in the streets, much as the sun may, from the spongey fields, be seen to loom by husbandman and ploughboy."