I'm a cynical (partly British) bastard so there's many that annoy me a lot (<- thats one of them)
-People that confuse your/you're
-People that confuse there/their/they're
-It's "a lot" NOT "alot"
-People that order an ice cream where I work and then go away while I'm doing their orders
-People that think I'm a psychic and don't tell me what flavor ice cream they want and then act surprised that they have to go look
-Impatient people
-Loud people
-Quiet people
-Coworkers that do something during their shift then don't bother to inform the next shift's supervisor which then causes something bad to happen and the one who was never told gets in trouble
Sorry, those last 6 were things I had to put up with today. Rant over.
EDIT:
Greenhand said:
People watching me as I work.
I honestly can't fucking stand it when that happens, I get so nervous/annoyed/angry that I have to slow waaaaay down before I make a big mistake. And this happens all the fucking time.
This too.
EDIT2: How did I forget about this one??!?!! The phrase "I could care less". So you're saying that you CAN care less than you do... MAKES NO SENSE!!!! The phrase is "I COULDN'T care less" meaning that it is impossible for you to care at all for whatever.
EDIT3: The excuse "because I said so". Saying that just proves that you don't have a good reason for whatever it is being talked about and make you look like an idiot.