"What a dork!"

[HowMayIHelpYouToday]

Me: Welcome to Bank, how may I help you?
Customer: I want X.
Me: I am sorry that dept is closed right now. Would you like their number and hours of operation?
Grumble Grumble.
Me: Do you have any other questions for me? (required to say this, BTW, and it's just common courtesy).
Customer: [Laughs]. Jesus. What a dork! <click>

Not a bitch. Not a fucker. A dork.

[Nurian]

Better watch out. He may get his jock buddies together and come give you a wedgie.

[bainsidhe]

I like the word "doofus" myself.

[DGoddessChardonnay]

I like the word "doofus" myself.

I've used that one before but I much prefer either Dingbat or Dingleberry.