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1.
a forehead that is covered with the four digits of one's own hand. if the fifth digit, the thumb, is also needed to cover the forehead it is called a fivehead.
"You see DBZ yesterday?"
"Yeah"
"Fuckin Vegeta way past a fourhead man more like a sixhead."
"Damn, thats true."
by playsgolfhigh January 07, 2012