What can make you really angry?and i mean REALLY..:D

When Dora the Explorer asks such obvious questions.

Dora: *to audience* Where do we go next?

Me: * shouting at TV* Why are you asking me?! Your the one with the map that you have in... oh, I don't know... EVERY EPISODE.

Dora: Where are the train tracks?

Me: Oh my God, Dora, are you blind?! They're RIGHT behind you. All you have to do is USE YOUR EYES. I mean, why else do you have them?!

Dora: How many trees are there?

Me: What? You don't know how to count all of a sudden---first of all,the answer's three---and why don't you stop being so lazy, and count them yourself!

Dora: What color is this?

Me: BLUE!! IT'S BLUE, YOU IDIOT!! It's people like her who make me wonder how she even passed kindergarten.

Dora: What is 2+2?

Me: *facepalm*

Only one thing has ever made me furious and that's when someone was dying right in front of me and I was unable to help.
So I decided to become a doctor and take as many medical courses and classes so that would never happen again :3
EVER.

Its hard to make me angry :P

Not knowing if my best friend feels the same way I feel about her.

Someone stealing my personal possessions.

To vaguely answer your question, I'd say just people saying and doing stupid shit. .-.

If you want me to be mais specific, then I guess when people spell things incorrectly just for giggles. Like for example:

"thx fir the add, kind ser."

↑
I've seen too much of this, and it makes me sick. I also hate when people ask useless perguntas on Random, that'll just cause mais problems, like:

"Are you racist?"
"Who's the stupidest person on fanpop in your opinion?"
"Report this User!" (←depends with this one)
"Can you ____ for me? Kthxbai"

And most of all, I hate when people egg-on the troll. Just leave it alone! If you just stop bitching about it, then maybe the troll with shut it's trollastic mouth and die in a hole somewhere remote.

It's actually pretty difficult to make me really angry.

aleatório asshole: "Anime sucks!"
Me: "Have you ever seen anime?"
aleatório asshole: "NO! Ewww, why would I watch that crap?"

Me: "...."

Me: "...."

Me: *Standing over his corpse* "....what?"

When someone takes my GODDAMN MOUNTAIN DEW!

a failed internet connection!

Notning makes me mais angry then when your tryna judge someones elses talent and you have none of your own

Alot.

Some being Ignorance,sexism and no geral, global stupidity.

When people shove their beliefs down others throats.

i get mad easily v.v ...so everything

People who don't know how to voice their opinions in a respectful manner (Ex: I hate *insert character* because she/he's a f***ing retard) and the get mad at you and/or tell you you're not letting them voice their opinion when you ask them nicely to be nice.

It's actually quite hard to make me angry, but when you do, you better watch out.
I'd say that people who are racist, sexist, or just plain imbeciles are the ones that make me angry.

I usually don't get angry very easily unless a) it's something that's really worth it or b) I'm under some really frustrating circumstances. Trolls and idiots affect me less than many people, I think, but sometimes I get ticked at them as well. And when I get ticked, often, I get really ticked, pretty immature, so stay away from me during that time. (BEAST SMASH!)

This!

People. Especially kids who go to my school who seem to only think they are greater than everyone else because everyone else is apparently dirt compared to them. Why should junior high kids worry about boyfriends and girlfriends? I mean all of these people have had at least 18 of them. I just feel different than all these kids.. Though there are many other things that anger me, though we don't have enough time to hear every little thing I hate..