To take a shit or crap.
I deficated on my neighbor's front porch.
ayon kay Fetus Humper ika-03 ng Oktubre, 2005
Yet another mis-spelling of an English word by an under educated public. Of course, the word they're struggling for is 'Defecate'.
I deficate (sic) on your poor use of the language!
ayon kay teaurn ika-01 ng Hunyo, 2007