1 definition by bkrazy

Top Definition
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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