Word used by French Canadians (see Frogs, Pepper or Pepsi) to describe English Speaking Canadians.
The term
Square Head refers to the way farm land was divided among the citizenry. The English had
square farms whereas the French had rectangular strip farms stemming from a river. If you google
map over Quebec and Manitoba you will clearly see the difference in farm shapes.
French Canadians used strip rectangular farms connected to a river so that more farmers can have access to water (more fair and productive). They find the square shape "stupid".
This is why it is an insult to call an English
Canadian a square head...