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1.
the act of intentionally setting off on a course of drunkeness that some may never find.
A state of complete drunkeness.
Did you see that, Buck? He's completely shitplowed after chugging a fifth of jager and chasing it with two red bulls.
by Nate M. January 31, 2006
 
2.
To be heavily intoxicated to the point of near blackout.
tanked,gone
This girl was so shit plowed last night that she couldn't tell I slipped her the index.
by Rhinoplaster April 06, 2008