Ok Now this just a few that I find funny...feel free to add any personal or WHATEVER things that make YOU Crabby! XD
(this is a book btw and Ill list things that apply to me in particular)

Customer service departments that don't.

Programming executives who haven't yet learned that the world doesn't
need yet another late night talk show.

People who say "Irreguardless"

People who say "I could care less" when they mean they couldn't care less.

People that say "very unique"

Your spelling bees being so far behind you that you need a dictionary to
spell "restaraunt"

Your High School Latin classes are so behind you that you use a dictionary to spell "Caeser Salad"

Missing the bus.
Missing the plane.
Missing the train.
Missing the point.
Fantasizing you are anywhere else other than the Dentists office when he calls your name.
The feel of the novocaine shot.
The sound of the Dentists drill.
*Just X-rays and cleaning* turning into X-rays cleaning and 2 fillings.
Bad breath on Dentists.
Your Dentist waiting till he is up to his wrists in your mouth to ask you a question.
Having your mouth packed with cotton wadding while your Dentist is spouting misguided political statements.
Painless Dentist who aren't.
Actually paying Dentists to do those things to you.

ok your turn ^^

title fixed ~jedi