what does pwn mean in leetspeak

it means I "own" your machine and can do what I want with it.
Deface your front page, Ruin your brand, 
email your competitors from your domain
ransomeware, customer harrassment. 
-OR-
			I might wana be vewy vewy quiet
the breached entity is never really the same after this experience.
Trust in the goodness of humanity goes right "out the window."