"pwnzor" is mostly used in the online gaming community, with games such as Halo, and Call Of Duty. It is said via the microphone or sometimes by text, to rub in the shame of defeat to the other player/team. (See also 'Pwnt', 'Owned' and 'Pwn')
(Little kid) "HAHAHAHAHA I'ma pwnzor you!"
(Teenager) "Wow, you suck. Get a life"