People unfamiliar with the CBC won't get that joke.
here's one I didn't get, from a booklet called "Canadian Jokes" that I found in a bunch of stuff from a house clearance when a relative passed away:
At a rural church service, the pastor decides to demonstrate to the assembled faithful how we are all in our different ways, sinners. "Stand up all those who have coveted their neighbour's goods!" he calls. A number of people stand up. Likewise for lying, stealing, etc. Last of all he says "Has anyone slandered their wife?". One guy stands up sheepishly. "When did you slander your wife?" asks the priest. "Oh, sorry, Father", the guy answers. "I thought you said 'slatter'".
Maybe a Canadian could explain?