A slang term used throughout New England and parts of Canada used to describe the phenomenon of Polish people who all seem to have unusually round heads.
"Yashoo has an extremely Round head, he is no doubt a ROUNDHEAD"
by Stash Leja November 11, 2004

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a fellow who is completely bald, or the head itself. So called because such a head looks round. Such guys may be labeled as nerds or outcasts, on account of their ugly heads.
Kenny,Kevin,Tom,Jamie,Matt,Robert,William,Uriah,Harun,and Jim all had their heads shaved,so now they're roundheads. They stink and look ugly,but as long as they're content,so be it.
by JMC70 November 28, 2016

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