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1.
a name to call someone when they are being really dum
guy:does 2+2+22?
girl:ur such a doornob
by macketteem,erly November 30, 2007
 
2.
A bustdown to the 3rd degree. (Cuz bustdowns have limits, but with doornobs, everybody gets a turn)
That doornob slob on my knob like corn on the cob
by Giddy November 30, 2003