The worst sounds in the world.

Absolutely any children or babies crying. It makes me go apeshit inside, but obviously I cant do anything about it except rage quietly.
People chewing loudly or with their mouth open. Humans are not cows, keep your mouth shut .
The sound of squelchy/mushy food
14-16 year olds talking to their friends. Arrghh
People that talk very loudly

Some guitar tones, some drums, metalcore vocals(high guttural).
Shoes screeching, babies crying.
Fights of any sort(not a particular noise, but fights near me make me annoyed/angry)

Here's a list of my personal worst sounds. Since i'm highly sensitive to loud noises, i got a lot on my list.

-Loud-ass door slamming/thud sounds.(The worst of all. Especially when i'm not expecting it. Quit interrupting my chuunibyo sessions!)
-People cheering/shouting out of joy (Woooo! OOOo! Eyeyeyeyeyey! the "WOOOO!" scream is the worst.)
-Boos (Booooo!)
-Ear rape
-Jumpscare Ear Rape
-Marble balls rubbed against eachother.
-Babies crying.
-Might add more.

A cat scratching against a wooden door with it's claws.

[size=10][color=red]Metal grinding, nails on chalkboard, EBS screech from TV[/color][/h]

2 things are the worst sounds in the world in my opinion.
One is the sound of children and women crying, kids sound annoying when they cry, and i dont like hearing a women cry, its just not right.
The other thing is the sound of an animal in pain, it hurts my ears and my heart.
Bonus worst sound, the sound of Revelations voice.

I found a new one. Not so bad but not one is like to happen IRL.

Sindel Screaming until your head exploded into satisfying giblets.
(I'm not a fan of gore, but any finishing/super move in fighting games are just satisfying to pull off to me)

Crying or laughing children at night when you're walking alone in the dark.

When somebody knocking the door like there's no tomorrow.

The sound of a girl saying "Let's just be friends." but you both know that's a complete lie.

I can't stand the sound of Velcro and styrofoam

Well we have this small metal bowl at our house that the little brother likes to eat from. That plus metal soup spoon is pure torture.

Definitely anything that sounds like screeching such as the random moments when a chalk decides to screech while it's being used on a blackboard, when a car suddenly brakes from full speed, etc

For me it isn't necessarily the sound, but the FEELING you get from using chalk on a chalkboard makes me cringe really hard.... I hate that feeling.

That "Ding" sound effect CinemaSins use in most if not all of their videos.
It's too loud and goes right through you. It is louder than his voice and the movie clips by a lot.
In fact every time I hear that ding it's too fucking loud compared to everything else.
I do recommend looking up CinemaSins if you haven't heard of it though.

OH GOSH THIS... My ear burn and I can hear noises long after people have stopped X_X Killer sound

also gotta add, the sound of fangirls screaming about yaoi things.

knife on a plate. that scratchy noise is the worst-
the dial-up connection tone is pretty brutal too. so glad i haven't used dial-up in about 10 years<3

Styrofoam on styrofoam.
The air raid siren test. (The damn thing is on my roof)
Cars backfiring (Not antilag though. That's alright somehow)

I'm alright with nails on a chalkboard. That's just a fun way of getting attention

Lately, when I've been opening up, say...packs of cracker or something close to that, the plastic makes my ears cry. I don't know why, but it's gotten annoying.

I think the worst sounds in my life are from girls crying or movies where they make sirens scream.