• Webster's Revised Unabridged Dictionary
    • n Hogpen A pen or sty for hogs.
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Century Dictionary and Cyclopedia
    • n hogpen A hog-sty; a pig-sty.
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In literature:

You'd keep the place looking like a hogpen, if I wasn't at you all the time.
"Back Home" by Eugene Wood
But, taking an axe, we cut young pine trees and constructed a fence round the wagon to serve as a hogpen.
"A Busy Year at the Old Squire's" by Charles Asbury Stephens
Connected with your hogpen, have a yard fifteen feet square for every five hogs; let that yard have no floor.
"Soil Culture" by J. H. Walden