What is Knucklehead?
1.
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.
2.
A dunce. A dummy. A very stubborn person or animal.
I told him how to do it, but he would not listen, the knucklehead!
3.
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
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4.
a person who doesn't listen, and stays in trouble
Dat boy a knucklehead he stay in trouble.
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5.
receiving a wicked blowjob while the woman masterfully utilizes her two hands in the dirty deed
Suzy gave me the most tremendous knucklehead last night.
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6.
A dickies wearing, cheap flannel shirt wearing, gangbangin Mexican with a shaved head. Almost always act like dicks.
Ah fuck dood... I was cruisin outta school and this big fuckin knucklehead came up to me and was like 'Eh Vato, Gimme your pinche money esse!' So I yelled for la migra, and wouldn'tcha know, the mafacker ran away! Fuckin hate knuckleheads.
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7.
A playful name to call someone, mainly done by the mentally challenged
