The Noob's Dictionary
So we all know that there are people who don't seem to understand what you are saying. They never coordinate with the team, they don't seem to understand basic instructions, and then they blame you when everything goes wrong. But, have you ever considered why? Maybe they're just using a different set of definitions.
(Please note: The following is for humor and should not NOT be taken as real strategic advice.)
Group: What the rest of the team does while you splitpush.
Luck: A very common quality that appears very similar to skill.
Skill: A unique quality that only you and possibly Faker possess.
Top: That guy who farms all game.
Mid: One of the Carry Roles. This is how you carry when you don't want to have to babysit a support.
ADC: The other Carry Role. You have to deal with a support, but you do even more damage when fed.
Support: A role that exists to get the ADC fed and place wards. Sometimes, though, they forget which one to help. (see also: feeder, slave, ward).
Jungler: A role that exists to win your lane for you. Even if you die before minions spawn, they are the only way for you to lose lane. It's ALWAYS their fault, unless it is the support's. (see also: gank, slave).
Tank: Someone who is too dumb to build damage. Typically, they'll walk right up to you, so kill them first.
Fighter: Like a tank, but they build enough damage that they can kill you if they are fed or lucky.
Mage: Useless if they run out of mana, which they will do immediately. Ignore them.
Assassin: A champion that gives your opponents free wins with no skill needed. Alternately, a super-high-skill champion that lets you make awesome plays. (see also: lcsbigplays)
Gank: An ambush, usually from the jungle. A request for a gank must always be obeyed, however impractical a gank would be, unless you are the jungler. You can do whatever you want. (see also: camping)
Camping: Repeatedly ganking the same lane. Typically done by the enemy jungler, to you. If you think there is the slightest chance you are being camped, you are. (see also: gank, play safe)
Pings: Little blips on the minimap. They can be safely ignored; the team should be following you.
Play Safe: An utterly meaningless concept. Ignore anyone who says this.
Ward: A waste of 75 gold.
Kills: The most important thing to have. (see also: KDA)
KDA: The ONLY metric of how well someone did.
Objectives: A distraction from getting kills.
Feeder: Someone who sucks at the game and dies a lot. Always rage at them; this will motivate them to die less.
Troll: Someone who sucks on purpose. One of the only things keeping you at Bronze 5 with 0 LP.
AFK: Someone who leaves the game because they're an asshole. There's no other explanation.
Lag: A phenomenon that occasionally causes you to die.
Fed: What an opponent must be to kill you if they lack luck and aren't smurfing. (It goes without saying that they lack skill.)
Bronze 5: Where you're stuck at because of feeders, trolls, smurfs, and AFKs.
Challenjour: Where you deserve to be.
Team: The group of idiots you have to carry.
Baron: The ONLY way to close a game. Taking baron is worth any risk. You can even solo it if you have to.
Minimap: A square thing in the bottom right corner. It doesn't do anything useful.
Counterpick: A free win in lane, regardless of your knowledge of the champion.
Smurfing: What other Challenger-level players do to make sure you never make it out of Bronze 5.
Skillshot: An ability with a travel time. They shouldn't actually require skill to land, just luck.
Mana: A limit on how fast you can kill things. (see also: cooldown, URF)
Cooldown: A limit on how fast you can kill things. (see also: mana, URF, Katarina)
Katarina: The highest skill champion in the game.
URF: Something Riot should bring back immediately.
Overpowered: Able to beat you.
Underpowered: Unable to 1v5 with you playing.
Followup: If you die 1v5, it's because your team didn't do this.
Peel: What your team does when you go for a pentakill. (see also: followup)
Tank Meta: Why you couldn't win that 1v5. Requires no skill.
Assassin Meta: The best this game has ever been. So many high-skill plays!
LCSbigplays: What you and the pros can do.
Pro Builds: These are the best builds, obviously, and it is safe to blindly copy them.
Trinket: A free item that doesn't do anything useful.
Vision: Not your responsibility.
Dragon: Part of the jungler's job is to make sure your team gets every single one. Obviously it is always his fault if you can't get 5 stacks.
Splitpushing: Farming away from your team. (see also: group, farming)
Farming: Killling minions. It gets you items, but not as fast as kills do.
CS: Stands for Consolation Stat, as in consolation prize.
Off-Meta: These picks are functionally identical to trolling.
CC: A broken no-skill mechanic. (see also: tank meta)
Assists: These are kind of like those participation trophies you got in kindergarten.
Blue Buff: The mid's birthright, unless you are the jungler. You obviously need it more.
Red Buff: Like Blue Buff, but for the ADC.
Chat: A place to tell other people how much they suck or how lucky they were.
Toxic: Everyone but you.
Updates on the way! If you have an idea, tell me and I'll add it!