Terminology
From MeFightclub
Cap - To capture a point (by standing on it) or the intelligence (by returning it to the intel cap zone in your base, which is usually the intel room).
Battlements - Common name for any raised area that's good to snipe from.
Crit - Critical round. Distinguished by them glowing your team colour, doing a crapload of damage, and making electricity sounds when you shoot them.
Engy/Engie - Short for Engineer
Face Crit - So you've got your normal crits that are mostly based on a radom chance. Then you've got the back-burner which will spew out crit fire whenever the enemy has their back turned. However, a lot of us have noticed that the "back side" detection code isn't perfect, so you'll sometimes get a big load of back burner crits to the face, aka "face crits". The term was preceded by "face stab" which is when the game gives a spy credit for a back stab when he and his target are facing each other. Source: betaray
Intel - the briefcase that you capture on CTF (capture the flag) maps. Its rough direction is usually indicated by the HUD at the bottom of your screen.
Overcharge/Overheal - The health boost from being healed by a medic. Medics can heal you to 150% of normal maximum HP.
Point - On control point maps, those silver-grey things in the ground than you stand on to 'cap' to win the round. Note: all (well, most) points are surrounded by a yellow-and-black line that denotes the 'cap area'. standing within the confines of the line will mean you cap the point, so anything within the line = the point. This means some points are huge and some are just the silver point nipple.
POTW - Player of the Week. A weekly award handed out by the previous week's winner based on no criteria except level of deserv-iness.
Rocket jump - when a soldier crouches, hits jumps, and fires a rocket at his feet, all at exactly the same time. Means you jump higher and can reign death down from above.
Skill Crit - Critical hits that happen all of the time under certain conditions. The only instances of this that exist at time of writing are Sniper headshots, Axetinguisher hits when target is on fire, Backburner hits from behind, and Kritzkrieg Ubercharge.
Spy pyro/demo/medic/etc. - does not mean 'watch you there's a spy by you, pyro/demo/medic' but 'the spy is disguised as a pyro/demo/medic.' Spy pyro = shoot at pyros at your team until someone says 'spy down' or until you are sure they are not spies.
Spyro - Spy disguised as pyro. Happens so often that a word that was faster to say was formed just for this disguise.
Sticky jump - the demoman's equivalent of the rocket jump, except with his 'remote pipe bombs' (stickies).
Sticky - the amunition of the demoman's secondary weapon. Official name is 'remote pipe bombs', most often called stickies.
Uber - When [Medic|Medics] heal, they gain ubercharge. At 100%, they can right click to activate a special effect upon the person they are healing. The normal medigun grants invulnerability for 10 seconds while the kritzkrieg grants 100% critical hits from all weapons for 8 seconds.
Winbombs - another name for stickies. Mainly used when complaining, or ironically.
