E.g Me: Hey mate, Tom, Kieran, and I are having a few beers, wanna come around for a Square John?
Mate: Of course, can’t say no to a Square John
Mate: Of course, can’t say no to a Square John
by Kizdogga December 30, 2019
A Square John is slang meaning a reliable trust worthy guy. The term originated from Bike Gangs and is common in the Canadian Prison system. It is considered to be a compliment if you are referred to as a Square John
by John-999 January 31, 2011