A fetish for girls of the Canadian race.
It's bad enough we have to live in America and now all the boys with Maple Fever are going to want to have at our daughter!
When someone has clear sexual preference for someone from Canada
"You've got the maple fever, huh buddy"
When you are physically atrracted to Canadians.
Boy 1: "I don't know what it is, but Canadian girls are so hot"
Boy 2: "hahaha, sounds like you've got maple fever"
When a Non Canadian has feelings for a Canadian.
"Did you hear about Bill's new girlfriend is from Vancouver? He must have Maple Fever."
Maple fever is where a man/woman has a sexual attraction to a person of Canadian descent.
So, you have a thing for Canadian girls, eh? Got the Maple Fever do ya boy?
A term usually applied to males who are not of Canadian descent and have a clear sexual preference for women of Canadian descent, although it can also be used in reference to non-Canadian females who prefer Canadian men.
"Every time we go to the club, Dave goes straight for the Canadian women. I swear, that dude's got a serious case of maple fever."