my first job waiting tables in wichita,ks was at a very busy mexican restaurant. we called 'them' canadians after a group came in often and never tipped and the man that always paid wore a Canadians baseball hat. one day a waiter was pissed off and when asked why he said the fucking Canadian didn't tip. when asked who didn't tip he said the fucking nigger in the Canadian's hat. After that the servers at on the border used it willingly and loudly,much like when mexicans speak about a person in spanish knowing the person is right their and unable to understand. only till recenct have people in town stopped using the term bc 'they' found out.