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A mixture of the words "jackass" and "dicknose" . It is used as a derogatory term, and/or to hurt someone's feelings. Once called a jacknose, you should feel like an embarrassment to society...but you can giggle away at the sound of the word.
Marty- What the fuck are you doing you jacknose?

Russ- Sorry, I was just counting pencils.

Example 2

Marty- Yes, I am wearing a sweater vest.

Russ- Yeah, you look like an absolute jaknose...
by Woodhau5 July 20, 2012
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