Camp (v) - To strategically hold a position, usually near spawn, so that the opponent cannot penetrate this location.  Sometimes involves having to hold onto the bomb indefinitely or not diffuse a planted bomb.  A dedicated player will never leave his post.

"Dammit, |Mac10|.  Plant the bomb and quit camping!" 

Flank (v) - Legendary strategy where the opponent is camped out and killed by a |Mac10| in an entryway from both sides

"Let's camp the blue door and flank these fools." 

Frag: Kill. Can be used as a verb or noun, e.g. "I just fragged him" or "First team to 20 frags". 

FPS: (1) First person shooter (game genre). 

FPS: (2) Frames-per-second, a measure of system performance. 

Jon (n) - Nickname for a server admin or other server member with admin priveleges who can kick/ban/slay another player

"Somebody call and wake up Jon cuz these guys are hacking!"
"SeaBass, do you think you could pick a server will a few more jons in it???" 

Lag: Time delay between sending a command to the game and your character actually performing the action. Frequently cursed when the time delay is longer than expected. 

Lagger: Someone with a slow connection, or who is late to react. 

Leet, 1337: Elite.

Mod: (1) Files created for a game to add functionality of change the behaviour of a game, written by people who don't work for the game developer.

Moderator. Someone who oversees forums or game channels. Duties include deleting undesirable posts and reprimanding troublesome users.

Noob: (or n00b) Newbie, new person, inexperienced person (often derogatory). 

Owned: Beaten by quite a large margin. Owned has a snappier ring to it, doesn't it? 

Old school (adj) - Referring to any older tactic|, sometimes referring to particular locations on particular maps.  This term is primarily used when alltalk is on and it is important that the opponent does not know the location of your team's players

"Old school on this one, SeaBass.  Let's flank them." 

Platform: Console type required to play the game. e.g. GetGosu.com's "Gosu" software platform. 
 
Pwn (v) - To kill an opponent, usually in a dominant fashion

"He got pwned by my Mac10 to the face" 

Pwned: Owned written in the "1337" language.  Could also be written Pwn3d.  
 
Pwntabulous (adj) - To be so good as to be thought of as a GetGosu.com 1337 member

"SeaBass, your Mac work is so pwntabulous." 

Pwntastic (adj) - To be so good as to be thought of as a GetGosu.com 1337 member

"SuperMan is pwntastic with the pump." 
 
Spam (n) - Any typed, keybound or microphone chatter or recordings that is annoying to other players

"Spam the URL, SeaBass."

(v) - To repeatedly type phrases or voicespam until other players are annoyed

"I spammed the mac10crew.com URL all over the place." 

Voicespam (n) - A recorded wav file that can be played repeatedly through for all players in the server to hear.

"Superman is using voicespam again."

(v) - To repeatedly spam a server and annoy other players by playing a recorded wav file through the voice system

"OMG stfu |Mac10| is voicespamming again and I can't hear anything."