Gank - to sneak up on an enemy champ and kill them, usually out of a bush or the jungle.
GG - good game. Usually said at the end of the game to congratulate teammates. Can also be used to declare the end of a game.
GJ - good job.
GL - good luck.
GLHF - good luck, have fun. Commonly used at the beginning of the game.
Golems - two monsters that spawn in the jungle. Not to be confused with the be confused with Blue golem. Killing the golems grants no buff, only gold and experience.
Harass - causing damage repeatedly to an enemy champ. This tactic can set up an enemy for a gank or simply make them return to base.
HF - have fun.
Hug - remaining close to one's own turret. Usually meant as a defensive measure, it allows a champ to harras an enemy while using a turret as a shield. Also referred to as "hump."
Initiate - to begin a team fight. Usually a champ who is tanky or has another defensive ability initiates a fight, focusing damage on themselves.
Innate - a champ's fifth ability that activates on its own. Most innates are simple buffs, but some are passive spells with cooldowns. Also called a Passive or Unique passive.
Invade - to push into the enemy team's jungle. Invading can have huge advantages, as it deprives and enemy jungler of gold and experience. However, invading is a very risky tactic and can lead to early jungler deaths.
IP - Influence Points; points that you get by playing games. IP can be used to buy champions, runes and rune pages.
Jungle - the portion of each map between lanes. Full of bushes and monsters.
Jungler - a player who spends much of the game in the jungle killing jungle monsters. Junglers maximize gold and experience across the entire team and provide roaming pressure. A player that's jungling is typically allowing the top lane to eat up all the minions from a land, thus funneling more gold and exp to that character. The jungler then also pressures lanes or assists those under pressure by ganking. (see: Gank).
KS - kill steal. Getting a last hit on a kill someone else did most of the damage for. Kill steals can apply to champs, jungle monsters, or minions.
Kiting - luring an enemy champ into attacking while staying out of range, damaging, and often while retreating.
L2P - learn to play. Usually said when a player is doing poorly.
Last hit - whoever deals the killing blow on a champ, minion, or monster will be awarded with the kill and associated gold.
League system - a six-tiered ranking system that allows players to move up in rank after winning a certain number of games.
Leash - to draw aggro from a monster, usually allowing a jungler to kill it without taking initial damage.
Lane - any pathway on either Summoner's Rift or Twisted Treeline. Marked by towers and a lack of bushes. Also can be used as a verb to describe the act of staying in-lane and pushing.
Life steal - a stat that turns physical damage dealt into health returned to the damaging champ. Similar to Spell vamp but with physical damage. A champ typically begins with a life steal stat of zero, and can be increased with items.
Lore - the mythology of LoL. Includes stories about champions, monsters, and maps.
Mid - the middle lane of Summoner's Rift.
MS - movement speed. A stat that increases how quickly a character can move.
Nerf - when, in the course of LoL's development, a champ is weakened. Usually only certain spells are nerfed, which can render some champs much less appealing.
Nexus - the center of each teams' base in Twisted Treeline and Summoner's Rift. A giant crystal that regenerates its own health over time and spawns minions.
Noob/Nub - a player new to League of Legends. Also used as a derogatory term for someone playing poorly.
Np - No problem
OMW - on my way.
OOM - out of mana.
OP - overpowered. OP is used to describe champs or certain spells that players believe are too strong to be fair.
Passive - an item or spell with a lasting buff. Also used to refer to a Unique passive or Innate.
Poke - to cause an annoying amount of damage repeatedly to an enemy champ. See also Harass.
Pull - this has two meanings. If a jungler asks for a "pull," he is asking for another champ to engage a jungle monster first. This will force the monster to attack a player other than the jungler, allowing the jungler to kill it easier. A pull is also any summoner spell that can pull an enemy toward them. Blitzcrank and Darius both have pulls.
Push - putting pressure on a lane. Pushing a lane means killing enemy minions and "pushing" them toward the enemy Nexus.