People who bring their 1-year old baby to a theater that's showing a scary or action movie.
The crying is inevitable. Keep that little heathen at home. Find a babysitter or don't have sex.
You know what really grinds my gears? When parents make you talk to their babies. Like wtf is wrong with you, I am trying to have a conversation with you not hear the results of a ripped condum blow spit bubbles on your Iphone.
Also Blue cheese. It's gross and icky.
My gears have been immensely tired out from the unlucky amount of roommates that I've had who chew with their mouths open whilst making that saliva-coated lip smacking noise.
When people who are allegedly passionate about music sit around complaining there's nothing new to listen to when they won't bother to look for or listen to anything other than their three favourite artists.