someone who copies every single fucking joke you say. Basically, a massive, unoriginal twat.
Person 1 - "lmao you have aids."
Person 2 - "yeah lmao you have aids."
Person 1 - "stfu you fucking hammerhead cunt."
by FingerCrossAndGodBless June 13, 2017
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In the process of getting road head on the highway, you drift your car over to the side and begin hitting every bit of rumble strip that you can find. Thus creating a vibrating sensation know as hammerhead.
When the road head just wasn't enough to get off, Johnny used the rumble strips of the highway to get hammerhead.
by bkrazy November 17, 2006
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Derisive nickname used by my boyfriend when I do something ditzy - a reference to the term "dumb as a bag of hammers."
Nice move, hammerhead.
by Blonder by the minute January 20, 2004
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The act of slapping your penis against another person's forehead as a form of an insult.
Most fratboys lock themselves in their giant houses and chase one another with their pants off to give each other wicked hammerheads.
by lankysob November 23, 2005
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an older woman who preys on young men in their late teens and early twenties.

a woman who robs cradles.
yeah, that chicks a cougar

no way dude, that kids 19... shes a hammerhead
by malcom202020 April 29, 2011
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A penis with a very large head. Often causes bleeding and/or causing the other person to become awestruck.
'Check out that hammerhead!'

Another word meaning fucked hard.
Wow, that massive shaft is such a hammerhead!
by willie989 January 19, 2010
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An aerobatic maneuver in which an aircraft flies straight up in a vertical path until it stalls, at which point it spins around and flies back down the same entry path.
Maximum entry speed for the hammerhead should be about 237 mph.
by Skimmer August 24, 2005
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