A2A - air to air.
A2G - air to ground.
AA - anti-aircraft.
AI - anti-infantry.
AV - anti-vehicle.
AP - armour-piercing.
HE - high-explosive
HEAT - high-explosive anti-tank.
HESH - high-explosive squash head.
ADS - aim down sights.
AMR - anti-material rifle.
AMS - advanced mobile station.
AOE - area of effect.
ASP - advanced specialisation programme.
BR - battle rank
CQC - close-quarters combat.
EMP - electromagnetic pulse.
ESF - empire specific fighter.
GSD - gate shield diffuser.
MAX - mechanised assault exoskeleton.
MBT - main battle tank.
OS - orbital strike.
PL - platoon leader.
SL - squad leader.
PS2 - PlanetSide 2.
PTS - public test server.
QRF - quick-reaction force.
RPM - rounds per minute.
SCU - spawn control unit.
TK - teamkill.
TTK - time to kill.
ZOE - zealot overdrive engine.
NC - New Conglomerate.
TR - Terran Republic.
VS - Vanu Sovereignty.
NS - Nanite Systems.
NSO - Nanite Systems Operatives.

37 abbreviations so far.

Air - general term for aircraft.
Airball - group of aircraft.
<anything>ball - variation on airball, group of any same-type vehicle.
<anything>fit - variation on outfit, used to describe the outfit e.g. cancerfit, casualfit, deadfit, elitefit, friendfit, midfit, sweatfit, zergfit.
Armour - general term for armoured vehicles that are resistant to small arms fire.
Baby Gate - Hardlight Barrier.
Bacon - Squad Beacon.
Bacon's Burnt - Squad Beacon destroyed.
Bacon's Crispy - Squad Beacon placed and ready for use.
Battle ANT - ANT with weapon equipped.
Battle Bus - Sunderer.
Battle Goose - Betelgeuse 54-A light machine gun exclusively available to the VS.
Bus - Sunderer.
Beacon's Lit - Squad Beacon placed and ready for use.
Beacon's Live - Squad Beacon placed and ready for use.
Beetlejuice - Betelgeuse 54-A light machine gun exclusively available to the VS.
Blueberry - friendly player not in your squad or platoon.
Bolter - bolt-action sniper rifle user, usually in CQC.
C4 Fairy - Light Assault with C4.
Cert - certification point, basic currency in PS2.
Chad - Turbo Flash.
Cheese - cheesy or scummy tactics, usually entails lots of ground-based force multipliers.
Cloaker - Infiltrator.
Conc - Concussion Grenade.
Dakka - lots of bullets.
Dance - zigzagging, usually whilst trying to pop medkits.
Deci - Decimator.
Dildar - Motion Spotter.
Dome - Citadel Shield.
Engie - Engineer.
Gal - Galaxy.
Genny - generator.
Ghost Cap - can mean two different things: 1) where enemies begin a base capture but then leave the base 2) capturing a base with no enemy presence.
Flip - change faction ownership.
Flock - large group of Reavers.
Footzerg - zerg to the next base on-foot.
Hard Spawn - base spawn.
Harry - Harasser.
Hex - base.
Infil - Infiltrator.
Instant Action - Join Combat.
Jump-Jetter - Light Assault.
Lane - series of lattice links.
Lib - Liberator.
Logistics - differs, but generally used for Nanite consumption, spawn options or vehicle transport.
Lolpods - A2G missile pods.
Maggy - Magrider.
MAX Crash - classic PS2 MAX swarm tactic.
Mossie - Mosquito.
Nade - grenade.
Nipple - top of a Citadel Shield.
Overpop - population balance advantage.
Pancake - Dervish.
Piss - Pelter Rocket Pods.
Pocket Flash - Flash XS-1.
Pocket Magrider - Javelin.
Pocket Orbital - Orbital Strike using Outfit Armoury assets.
Pop - population.
Pub - friendly player not in your squad or platoon.
Pubby - friendly player not in your squad or platoon.
Pull - get from terminal.
Random - friendly player not in your squad or platoon.
Rep - repair.
Rez - revive.
Ringer - player brought into an outfit solely for the purposes of competing in a tournament.
Skill Stick - Medical Kit.
Skill Suit - MAX.
Sky Whale - Galaxy.
Soft Spawn - non-base spawn.
Spider Tank - Chimera.
Spitty Bae - female Engineer who is very resourceful with her Spitfire Turret.
Sundy - Sunderer.
Swarm - large group of ESFs, usually Mosquitos.
Titty - Citadel Shield.
Treecon - Beacon in a tree.
Valk - Valkyrie.
Vehicle Gate - ray shield that only allows vehicles from the owner faction to pass through.
Virgin - Cloak Flash.
Waffle - Dervish.
Way - waypoint.
Zerg - massive overpop.
Zergsurfing - not intentionally zerging, but taking advantage of a friendly zerg, usually to farm.
Zombie - revived enemy.
Banana Building - common two-storey crescent-shaped building archetype found throughout Auraxis, usually with a bridge to a Power House.
Chevron - common one-storey V-shaped building archetype found throughout Auraxis.
Double-Stack - two-storey building.
I-Building - common one-storey I-shaped building archetype found throughout Auraxis.
Mezzanine - common cuboid-shaped two-storey building archetype found throughout Auraxis.
Power House - common two-storey building archetype found throughout Auraxis.
L-Building - common two-storey L-shaped building archetype found throughout Auraxis.
V-Shape - common one-storey V-shaped building archetype found throughout Auraxis.

91 terms so far.

Some of the abbreviations and terminology listed above may be more specific to the outfits I play with or the server I play on. I might have also missed some abbreviations or terminology. Please feel free to feedback in the comments section below and I will do my best to keep the guide updated.