Some of these have been mentioned already, but I totally agree:
1. "What the...?" - this phrase has been banned from my house. There is just not a good enough word to finish this sentence that any school-aged child should be saying. If they mean to say "What the Heck", then they should just say it and finish the sentence so my mind stops going to bad places to finish it out on my own!
2. Jellie (jealous), cray-cray (crazy), etc. I use these words in a silly way to tease my 11-12 year old girls on the team I coach, but I hate when they are used for real!
3. "Aaawwwhhhaaatttt??????" From Family Guy. I HATE when my DH says this. So embarrassing.
4. "dis" 'da" "doe" - is it that hard to type a couple more letters? "This is the last chance, though". Doesn't take more than an extra second.
5. They are "The face of our company" or "The Front Lines" a trite consolation-prize from the CEO of a company to to try "honor" the people who work the customer-facing or public positions of a company (usually at min wage). I heard this last week while watching "Undercover Boss" and it was annoying because we all know that the reason it makes big news that a multi-million dollar CEO gives his employees anything extra is because it is so rare. 99% of the time, the CEO will walk through their own company shielded from the "little people". (another irritating phrase!)
6. "Hey Gang". "OK, Team..." "What can we do to fix this?" - All are email starters that will ultimately be my problem and added work from a coworker who doesn't want to take part in a solution. My responses: First of all, I am not a part of a gang. 2nd, you are only nice to me when you want something...I have never been on your "team" and never will be. 3. Who is "WE"?? You mean "ME?" Then, just say "you".
Adding:
Sissy - when a little kid's parent is referring to their baby girl with an older sibling. Drives me nuts. Seriously parents...your kid has a name. Use it.
Newbie - hate that word. It's so condescending. I spent a lot of time, money, sacrifice, and hard work to earn a degree in my field. I hated it when I was the "Newbie" at my company.