The fucking deep bass of the industrial air conditioning while tired/hungover that pushes on your eardrums and makes you want to punch things,
Puking, obviously.
The shhchlplat of something like oatmeal hitting the floor.
Cutting through gristle on steak.
The yelp your dog makes when his foot gets stuck under the door.
Anything monotone/repetitive. ex) ticking clock. Hate that shit.
When your really hungover and people are just talking and making noise.