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'p' is short for 'pure', and pure
is short for pure methamphetamine,
which is a smokable form of speed.
In new zealand it is hard to get cocaine
so people do speed instead. When people
get hooked on 'p' they become a
"p head".
its the next level below the "crack head"
did you hear about that guy that got decapitated
with a samurai sword?

yeah one of those damn p heads went nuts
after playing grand theft auto for 93 hours straight.
by karlos karlito April 13, 2004