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2.
When a person runs around like a chicken with his or her head cut off, due to a lack of caffeine in his or her system.
"Dude, I couldn't even find a clean pair of socks this morning, I was so decaffitated."
by Geoff Lilley September 04, 2008
 
1.
Someone secretly switching your coffee to decaf thus rendering you useless.
I was kind of a dick to the guy at starbucks today, I think he may have decaffitated me.
by Craylon Jennings December 13, 2010