1 definition by LickMySwedishMeatBalls

Squarehead is a late 19th century ethnic slur directed at German and Scandinavian immigrants. The phrase is meant quite literally as a disparaging reference to the cranial features, though often just used as a generic ethnic slur against those groups.

Basically the stereotypical shape of a Northern European's head was thought to be square- so it was (and is) an insult to call someone with that ethnic makeup squarehead.
Kid: "Mommy, did you see how weird that Norwegian's head looked?"

Mother: "Yes dear, the fucking Squareheads do have unusually shaped skulls. The Swedish have even more box-like heads... don't even get me started on the Danes or Germans..."
by LickMySwedishMeatBalls April 24, 2010
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