Behavior engaged in (usually repeatedly) by a person of low intelligence, poor judgment, and/or extreme assholery. Such behavior more often than not results in the pissing off of others (although on some occasions it can result in great amusement).
Man I'm sick of his fuckheadery. He kept me waiting for two hours to hear whether we'd hang or not, then texted me saying he was getting freaky with his girlfriend and couldn't chill.
by locutusofdouche February 02, 2010