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1.
A form of being already pissed when something else bad happens that adds to it.
guy: I was pissed when I found out that my gf was sleeping with my neighbor. Finding out that I got her pregnant added to my pissation.
by Big Little B February 08, 2010
 
2.
The act of being of pissed off.
Drew: Aw fuck!

Mike: What

Drew: Ian is the cause of my pissation. That stupid bastard cheated on me with his gay lover!

Mike: Oh shit, not my problem you had a one inch pinch.

Drew: How'd you know?!

Mike: Your mother told me last night.
by KevinKevinKEVIN March 08, 2014