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1.
When you put your hard-on up between your stomach and wasitline of your pants so the top comes out. Helps protect from the dreaded "Pitchin' a Tent" look. Do not use if shirtless.
I was sitting there and out of nowhere I got a boner! So I readjusted to the Canadian Beltbuckle and nobody saw a thing! :)
by Iluvcumming April 26, 2006
 
2.
When one puts his or her penis up at their waistline wear the head of the penis sticks out. Try it at parties.
"Dude, check it out, his sporting a Canadian Belt Buckle."
by Jtron 3000 September 08, 2003