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1. A person who is completely clueless about how stupid they look and act.
2. A person who is an asshole and an idiot.
4. Some one who usually tries to screw people over but are too ignorant to accomplish it.
3. Related to the phrase "dumb as a door knob", except the person is also an asshole. They are a "fuck knob."

Synonyms: Dumbass, Moron, Idiot, Retard, Fucktard.
"My neighbor was caught on camera climbing my fence and urinating in my pool but denied it. What a fuck knob!!"
by Bob Andweave August 06, 2007
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2
Another, less prurient, name for the male cock, penis, member, knob, rod, stiffy. Often referred to as an Engorged Fuck Knob when fully erect and rigid.
Kara loved to give head. She loved nothing more than to inhale her boyfriend's engorged Fuck Knob and suck him to completion.
by Enya Goode April 28, 2015
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3
A stupid person whose only purpose is to waste oxygen. (See also douche bag)
"Get the hell out of my way, you fuck-knob!"
by vicfan March 23, 2004
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4
a dumb person or someone you cant stand
bob is a fuck knob he talks too much
by wes elliott January 21, 2008
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