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3. knucklehead
Engine produced by the Harley Davidson Motorcycle Company from(1936 to 1947). The engine consists of an overhead-valve v-twin design with covers on the valves that resembled knuckles, hence the name of "knucklehead".
Mike's knucklehead got repo'd after he missed his second payment
1. knucklehead
From the 1930's (circa). Refers to a person of questionable intelligence. The size of the brain being given relative size of a human knuckle. Similar to pinhead.
That guy just sat on a bench with wet paint. What a knucklehead.
by The Phat Doctor Dec 27, 2004 add a video
2. knucklehead
A dunce. A dummy. A very stubborn person or animal.
I told him how to do it, but he would not listen, the knucklehead!
by Merrily McCarthy Jul 17, 2003 add a video
4. knucklehead
a person who doesn't listen, and stays in trouble
Dat boy a knucklehead he stay in trouble.
5. knucklehead
the punching of a boner in attempts to make it go away.
dude I got a boner in the parking lot so I gave myself some knucklehead to make it go away.
6. Knucklehead
A nickname associated with fans of the heavy metal band Five Finger Death Punch.
Judging by his 5FDP shirt, he must be a Knucklehead.
7. knucklehead
someone who is irresponsible and acts ignorant
Don't be a knucklehead you understand what's being said.
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