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2.
a phrase commonly heard in minnesota with a minnesotan accent.

what bobby's mom from bobby's world says a lot in a minnesotan accent.
i'm a loser, dontcha know.

bobby's a right sweetheart, dontcha know.
by papermachete October 26, 2005
 
1.
A Minnesota pharse that can be put into any sentence and still make perfect sense to another Minnesotan. In reality, these three words (two actually real words) are completely pointless, but nessicary to speak Minnesotan fluently (See also could be worse, you betcha.
I went to the store today, don't cha know. ~ Don't cha know, he was one of those liberal fellas. Crazy as hell, don't cha know. ~ I'm stuck in traffic again, don't cha know. (Please, you get the idea)
by Aaron Bartholomew Poxleitner July 17, 2005
 
3.
Common phrase at the end of sentences used by people from Minnesota and Wisconsin. Can be used in almost any sentence. If you go to the south and say this everyone will think you're Canadian.
I went fishing on the boat yesterday Don't Cha Know?
by Weskonsin August 24, 2014