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Adjective - A phrase that describes when one is acting as if they had a horn in their knee. One who is "horn knee" is being whiny and unpleasant.
Guy: Hey, how's it going?
Girl: Fuck you, creep.
Guy: Jesus Christ, somebody's horn knee or something!!!
Girl: ...O...Kay...
by djbigdildobilbobaggins April 10, 2015
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