The condition a person suffers from when their head is wedged firmly up their ass. It's a phenomenon that affects millions of people on a daily basis, and usually results in the person saying incoherant or completely retarded things.
Dave: Hey John, did you hear about Larry from across the hall?
John: No. What happened?
Dave: He told a nun that she needed to jam out with her clam out.
John: What a fucktard, he's got a bad case of headupassitis.
John: No. What happened?
Dave: He told a nun that she needed to jam out with her clam out.
John: What a fucktard, he's got a bad case of headupassitis.
by talldude65 August 16, 2010
Get the headupassitis mug.Mall owner: “I can’t believe it! Those old ladies just drove into bushes then just drove off without a care!”
Police: “Must have a bad case of headinassitis.”
Police: “Must have a bad case of headinassitis.”
by RL050 December 28, 2018
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