To be so angry that your outward appearance takes on a constipated look.

Usually occurs at work following some ridiculously stupid decision made by a complete retard (or an entire team of retards). You will tend to be caught sitting at your desk with a far away thoughtful look but you're completely red-faced as if trying to push a stubborn turd out of your ass.
Christian: What the hell is wrong with Paul?

Lee: Oh he was told he's going back to work the phones at the helpdesk for a few hours so he's angerpated.
by whev January 6, 2011
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The state of madness that is soo extreme, you seem to axcidentally soil your pants
Guy#1 : Omg this is total BS, XBOX LIVE server is down! I AM SOO ANGERPANTS RIGHT NOW, its gross.

Guy# 2 : you sould change your pants, i can see your angerpants mark.
by Zantonious Aquilous August 7, 2009
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