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2.
When you don't have an ankle so it goes from knee to ankle to foot.
That girl needs to lay off teh McDonalds she has knackles.
by Scottcay July 30, 2008
 
1.
Someone that is very annoying and doesn't realize it, which only adds to there annoyingness
"that guy won't stop singing Don't Stop Believing."

"He thinks he's so great, it is SO ANNOYING!"

"I know, he's such a knackle!"
by scis_me_fosho February 03, 2010