O dear 

Being shocked beyond all reason and no other words that can escape your mouth.

Can be used to express shock, grief, amazement, disbelief, annoyed, etc.

Guy 1: Who is Chuck Norris?
Guy 2: Are you serious?
Guy 1: Yea.
Guy 2: O dear.

O dear by Baron S. July 22, 2009

O DEAR 

when somebody says something so utterly stupid that it simply has to be shouted sarcastically accross the room

aimee: are polar bears made out of fibre-glass?
frank: O DEAR!!!

O DEAR by Tom Joyce May 24, 2006

shit-o'dear

exclamation expressive of several emotions including, but not limited to, disdain, surprise, disbelief, pain, consternation, etc.

Shit-o'dear! This is unbelievable!

shit-o'dear by MCPDX June 19, 2010