noun (used with a singular verb)
Examples from the Web for whiteboys
It would be best for us follow after the rest of the army of the Whiteboys.The Unicorn from the Stars and Other Plays|William B. Yeats
From Armagh we marched to Naas, the country to the south having become much disturbed by the Whiteboys, as they termed themselves.Twenty-Five Years in the Rifle Brigade|William Surtees
But why, Alick, are you surrounded by such a number of Whiteboys.
And does he blacken his face as well as the other Whiteboys?
Returning to Ireland, he found the peasantry engaged in the great agrarian struggle which produced the “Whiteboys.”By the Barrow River|Edmund Leamy