Dictionary.com
definitions

squarehead

[skwair-hed]
noun Slang.
  1. a stupid person.
  2. Extremely Disparaging and Offensive.
    1. a contemptuous term used to refer to a German or Dutch person.
    2. a contemptuous term used to refer to a Scandinavian, especially a Swede.

Origin of squarehead

An Americanism dating back to 1905–10; square + head
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for squarehead

Historical Examples of squarehead

  • There's the Squarehead so rejuced he even offers to wash me tin plate for me.

    The Flying Bo'sun

    Arthur Mason

  • That lady is a graduate of Vasser College, an the one shes in with is a squarehead.

  • The second sailor was a squarehead and rushed his antagonist.

    Uncle Sam Detective

    William Atherton Du Puy

  • After a couple of weeks of it, Olaf, a squarehead sailor, got an idea.

    The Red One

    Jack London

  • Let's borrow a blanket or two from The Squarehead an' curl up on deck.

    Captain Scraggs

    Peter B. Kyne