Someone who disagrees with something that is widely accepted by others, seemingly for no reason. The word comes from toothpaste advertisements, which often claim that "Nine out of ten dentists" recommend using their brand of toothpaste.
Mark: "I was making plans with the boys, but Adam kept arguing about all of our plans even though everyone else was on board."
Craig: "Man, the tenth dentist really had to go and ruin the fun for everyone, huh?"
The time period, usually a week to a month, after a dentist's appointment where you actually brush your teeththree times a day, floss, and use mouthwash. After this time period, one goes back to their old ways of dental hygiene.
The fear that always creeps into your mind while sitting in the lobby of the dentist's office, even though you know it's just the dentist and you're being stupid and panicking about nothing. Many people try to calm this syndrome by reading one of the magazines or books in the lobby, but usually this just makes things worse.
(In the Dentist's Office)
Bob: (reaches for lobby magazine and starts reading)
Tracy: Gosh Bob, I've never seen someone look so nervous reading a magazine before! What's wrong?
Bob: Uhhhh it's nothing, really.
Tracy: Bob, don't tell me you still have Dentist's Office Fear Syndrome!! I thought you were over that years ago!!
Bob: Ahhh stop it!! I can't control it!!(Breaks out in hysterical crying)